Datasheet

 1996 Microchip Technology Inc.
Preliminary
DS40122B-page 145
PIC14000
Figure 7-15: I
2C
Waveforms For Transmission
(7-bit Address) ........................................... 51
Figure 7-16: MISC Register ........................................... 53
Figure 7-17: Operation Of The I
2
C in Idle_Mode,
RCV_Mode or Xmit_Mode ......................... 54
Figure 7-18: SMHOG State Machine ............................. 55
Figure 8-1: A/D Block Diagram .................................... 58
Figure 8-2: Example A/d Conversion Cycle ................. 59
Figure 8-3: A/D Capture Timer (Low Byte) ................... 59
Figure 8-4: A/D Capture Timer (High Byte) .................. 59
Figure 8-5: A/D Capture Register (Low Byte) .............. 59
Figure 8-6: A/D Capture Register (High Byte) .............. 59
Figure 9-1: Level-shift Networks .................................. 66
Figure 9-2: Slope Reference Divider ............................ 67
Figure 9-3: Comparator and Programmable
Reference Block Diagram .......................... 68
Figure 9-4: Programmable Reference Transfer
Function ..................................................... 70
Figure 9-5: Comparator CONTROL Register ............... 71
Figure 9-6: PREFA Register ........................................ 72
Figure 9-7: PREFB Register ........................................ 72
Figure 9-8: Voltage Regulator Circuit ........................... 73
Figure 10-1: Configuration Word..................................... 75
Figure 10-2: MISC Register ........................................... 76
Figure 10-3: Crystal/Ceramic Resonator Operation
(HS OSC Configuration) ............................ 77
Figure 10-4: External Clock Input Operation
(HS OSC Configuration) ............................ 77
Figure 10-5: External Parallel Resonant Crystal
Oscillator Circuit ......................................... 77
Figure 10-6: External Series Resonant Crystal
Oscillator Circuit ......................................... 78
Figure 10-7: Simplified Block Diagram of On-chip
Reset Circuit .............................................. 78
Figure 10-8: External Power-on Reset Circuit
(For Slow V
DD
Power-up) .......................... 80
Figure 10-9: Interrupt Logic Schematic .......................... 82
Figure 10-10: External (OSC1/PBTN) Interrupt Timing .... 83
Figure 10-11: Watchdog Timer Block Diagram
(with Timer0) .............................................. 85
Figure 10-12: SLPCON Register ...................................... 88
Figure 10-13: Wake-up From Sleep and Hibernate
Through Interrupt ....................................... 88
Figure 10-14: Typical In-system Serial Programming
Connection ................................................. 90
Figure 11-1: General Format for Instructions ................. 91
Figure 13-1: External Clock Timing .............................. 111
Figure 13-2: Load Conditions ....................................... 112
Figure 13-3: CLKOUT and I/O Timing .......................... 113
Figure 13-4: Reset, Watchdog Timer, Oscillator Start-up
Timer (HS Mode) And Power-up Timer
Timing ...................................................... 114
Figure 13-5: TIMER0 Clock Timings ............................ 115
Figure 13-6: I
2
C Bus Start/Stop Bits Timing ................. 116
Figure 13-7: I
2
C Bus Data Timing ................................ 117
Figure 13-9: Typical I
PD
4 vs VDD ................................ 118
Figure 13-10: Typical I
PD
3 vs VDD ................................ 118
Figure 13-11: V
TH
(Input Threshold Voltage)
of OSC1 Input (in HS Mode) vs V
DD
........ 118
Figure 13-12: Typical I
DD
vs Freq (Ext clock, 25 ° C) ...... 119
Figure 13-13: Maximum, I
DD
vs Freq (Ext clock,
-40 ° to +85 ° C) .......................................... 119
Figure 13-14: Maximum I
PD
1 vs Freq (Ext clock,
-40 ° to +85 ° C) .......................................... 120
Figure 13-15: PIC14000 Watchdog Timer Time-Out
Period (T
WDT
) vs. Temperature (Typical) 120
Figure 13-16: WDT Timer Time-out Period vs V
DD
.........121
Figure 13-17: Transconductance (gm) of HS Oscillator
vs V
DD
......................................................121
Figure 13-18: I
OH
vs V
OH
, VDD = 3V* ............................121
Figure 13-19: I
OH
vs V
OH
, VDD = 5V* ............................121
Figure 13-20: I
OL
vs V
OL
, VDD = 3V* .............................122
Figure 13-21: I
OL
vs V
OL
, VDD = 5V* .............................122
Figure 14-1: Bandgap Reference Output
Voltage vs. Temperature
(Typical Devices Shown) ..........................128
Figure 14-2: Programmable Current Source
vs. Temperature
(Typical Devices Shown) ..........................128
Figure 14-3: Temperature Sensor
Output Voltage vs. Temperature
(Typical Devices Shown) ..........................129
Figure 14-4: Slope Reference Ratio
(K
REF
) vs. Supply Voltage
(Typical Devices Shown) ..........................129
Figure 14-5: Slope Reference Ratio
(K
REF
) vs. Temperature
(Typical Devices Shown) ..........................130
Figure 14-6: Programmable Reference
Output vs. Temperature (Typical) .............130
Figure 14-7: Internal RC Oscillator Frequency
vs. Supply Voltage
(Typical Devices Shown) ..........................131
Figure 14-8: Internal RC Oscillator Frequency
vs. Temperature
(Typical Devices Shown) ..........................131
LIST OF TABLES
Table 3-1: Pin Descriptions ........................................... 9
Table 4-1: Calibration Data Overview.......................... 13
Table 4-2: Calibration Constant Addresses................. 14
Table 4-3: Special Function Registers for the
PIC14000 ................................................... 15
Table 5-1: Port RC0 Pin Configuration Summary........ 28
Table 6-1: Summary of TIMER0 Registers.................. 40
Table 6-2: Registers Associated with Timer0.............. 40
Table 7-1: I
2
C Bus Terminology .................................. 44
Table 7-2: Data Transfer Received Byte Actions ........ 49
Table 7-3: Registers Associated With I
2
C Operation .. 52
Table 8-1: A/D Channel Assignment ........................... 60
Table 8-2: Programmable Current Source Selection... 61
Table 8-3: A/D Control and Status Register 0 ............. 62
Table 8-4: A/D Control and Status Register 1 ............. 63
Table 8-5: PORTA and PORTD Configuration............ 63
Table 8-6: CDAC Capacitor Selection (Examples
for Full Scale of 3.5V and 1.5V) ................. 64
Table 9-1: Programmable Reference Coarse
Range Selection......................................... 69
Table 9-2: Programmable Reference Fine
Range Selection......................................... 70
Table 10-1: Ceramic Resonators................................... 77
Table 10-2: Capacitor Selection For Crystal
Oscillator .................................................... 77
Table 10-3: Status Bits And Their Significance ............. 79
Table 10-4: Reset Condition For Special Registers ...... 80
Table 10-5: Reset Conditions For Registers ................. 81
Table 10-6: Summary of Power Management
Options....................................................... 86
Table 11-1: Opcode Field Descriptions ......................... 91
Table 11-2: PIC14000 Instruction Set ........................... 92
Table 12-1: Development Tools From Microchip......... 106
Table 13-1: External Clock Timing Requirements....... 111