Datasheet

 
 
SBAS323G − JUNE 2004 − REVISED OCTOBER 2007
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14
PIN DESCRIPTIONS
PIN # NAME DESCRIPTION
1 XOUT The crystal oscillator pin XOUT supports parallel resonant AT-cut fundamental frequency crystals and ceramic
resonators. XOUT serves as the output of the crystal amplifier.
2 XIN The crystal oscillator pin XIN supports parallel resonant AT-cut fundamental frequency crystals and ceramic
resonators. XIN can also be an input if there is an external clock source instead of a crystal.
3-10 P3.0-P3.7 Port 3 is a bidirectional I/O port. The alternate functions for Port 3 are listed below. Refer to P3DDR, SFR B3h−B4h.
3-10
P3.0-P3.7
Port Alternate Name(s) Alternate Use
P3.0 RxD0 Serial port 0 input
P3.1 TxD0 Serial port 1 input
P3.2 INT0 External interrupt 0
P3.3 INT1/TONE/PWM External interrupt 1/TONE/PWM output
P3.4 T0 Timer 0 external input
P3.5 T1 Timer 1 external input
P3.6 WR External memory data write strobe
P3.7 RD External memory data read strobe
11, 14, 15, 42, 58 DV
DD
Digital Power Supply
12, 41, 57 DGND Digital Ground
13 RST Holding the reset input high for two t
OSC
periods will reset the device.
16 RDAC0 IDAC0 Reference Resistor Pin
17 VDAC0 VDAC0 Output
27 AGND Analog Ground
18 AIN0/IDAC0 Analog Input Channel 0 / IDAC0 Output
19 AIN1/IDAC1 Analog Input Channel 1 / IDAC1 Output
20 AIN2/VDAC2 Analog Input Channel 2 / VDAC2 Output (MSC1211 and MSC1212 only)
21 AIN3V/DAC3 Analog Input Channel 3 / VDAC3 Output (MSC1211 and MSC1212 only)
22 AIN4 Analog Input Channel 4
23 AIN5 Analog Input Channel 5
24 AIN6/EXTD Analog Input Channel 6 / LVD Comparator Input, Generates DLVD Interrupt
25 AIN7/EXTA Analog Input Channel 7 / LVD Comparator Input, Generates ALVD Interrupt
26 AINCOM Analog Common; can be used like any analog input except during Offset − Inputs shorted to this pin.
28 AV
DD
Analog Power Supply
29 REF IN− Voltage Reference Negative Input (must be tied to AGND for internal V
REF
use)
30 REFOUT/REF IN+ Internal Voltage Reference Output / Voltage Reference Positive Input
31 VDAC1 VDAC1 Output
32 RDAC1 IDAC1 Reference Resistor Pin
33 NC No Connection; leave unconnected.
34-40, 43 P2.0-P2.7 Port 2 is a bidirectional I/O port. The alternate functions for Port 2 are listed below. Refer to P2DDR, SFR B1h−B2h.
34-40, 43
P2.0-P2.7
Port Alternate Name Alternate Use
P2.0 A8 Address bit 8
P2.1 A9 Address bit 9
P2.2 A10 Address bit 10
P2.3 A11 Address bit 11
P2.4 A12 Address bit 12
P2.5 A13 Address bit 13
P2.6 A14 Address bit 14
P2.7 A15 Address bit 15
(1)
SDA and SCL are only available on the MSC1213.