Datasheet

Data Sheet ADuC832
Rev. B | Page 3 of 92
Dual Data Pointers .......................................................................... 62
DPCON (Data Pointer Control SFR) ....................................... 62
Power Supply Monitor .................................................................... 63
PSMCON (Power Supply Monitor Control Register ) ........... 63
Watc hdog Time r .............................................................................. 64
Time Interval Counter (TIC) ......................................................... 65
TIMECON (TIC Control Register) .......................................... 65
INTVAL (User Time Interval Select Register) ........................ 66
HTHSEC (Hundredths Seconds Time Register) .................... 66
SEC (Seconds Time Register) .................................................... 66
MIN (Minutes Time Register) ................................................... 66
HOUR (Hours Time Register) .................................................. 66
8052-Compatible On-Chip Peripherals ....................................... 67
Parallel I/O ................................................................................... 67
Port 0 ............................................................................................. 67
Port 1 ............................................................................................. 67
Port 2 ............................................................................................. 67
Port 3 ............................................................................................. 68
Additional Digital I/O ................................................................ 68
Read-Modify-Write Instructions .............................................. 69
Timers/Counters ......................................................................... 70
Timer/Counter 0 and Timer/Counter 1 Data Registers ........ 71
Timer/Counter 0 And Timer/Counter 1 Operating Modes ...... 72
Mode 0 (13-Bit Timer/Counter) ............................................... 72
Mode 1 (16-Bit Timer/Counter) ............................................... 72
Mode 2 (8-Bit Timer/Counter with Autoreload) .................... 72
Mode 3 (Two 8-Bit Timer/Counters) ....................................... 72
Timer/Counter 2 ............................................................................. 73
T2CON (Timer/Counter 2 Control Register) ......................... 73
Timer/Counter 2 Data Registers ............................................... 73
Timer/Counter Operation Modes ............................................ 74
UART Serial Interface ..................................................................... 75
SBUF ............................................................................................. 75
SCON (UART Serial Port Control Register) ........................... 75
Mode 0: 8-Bit Shift Register Mode ........................................... 76
Mode 1: 8-Bit UART, Variable Baud Rate ................................ 76
Mode 2: 9-Bit UART with Fixed Baud Rate ............................ 76
Mode 3: 9-Bit UART with Variable Baud Rate ........................ 76
UART Serial Port Baud Rate Generation ................................. 77
Timer 1 Generated Baud Rates ................................................. 77
Timer 2 Generated Baud Rates ................................................. 77
Timer 3 Generated Baud Rates ................................................. 78
Interrupt System .............................................................................. 80
IE (Interrupt Enable Register) ................................................... 80
IP (Interrupt Priority Register ) ................................................ 80
IEIP2 (Secondary Interrupt Enable Register) ......................... 80
Interrupt Priority ........................................................................ 81
Interrupt Vectors ......................................................................... 81
ADuC832 Hardware Design Considerations .............................. 82
Clock Oscillator ........................................................................... 82
External Memory Interface........................................................ 82
Power Supplies ............................................................................. 83
Power Consumption ................................................................... 84
Power Saving Modes ................................................................... 84
Power-On Reset ........................................................................... 84
Grounding and Board Layout Recommendations ................. 85
Other Hardware Considerations ................................................... 87
In-Circuit Serial Download Access .......................................... 87
Embedded Serial Port Debugger .............................................. 87
Single-Pin Emulation Mode ...................................................... 87
Typical System Configuration ................................................... 87
Development Tools ......................................................................... 88
QuickStart Development System .............................................. 88
QuickStart Plus Development System...................................... 88
Outline Dimensions ........................................................................ 89
Ordering Guide ........................................................................... 89