User guide

Arch Meter Corporation PS1000 Ver1.2
PS1000Rev. 1.2 May 2006
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15. PIN Mapping
LQFP-128 Package
Left Side
Pin# Name Type Description
1 P3.6 I/O 8051 P3 I/O port bit 6 (WR_)
2 P3.7 I/O 8051 P3 I/O port bit 7 (RD_)
3 VSSA Ground Analog Ground
4 VCM1 O Reference output
5 IBM I IBM input
6 IBP I IBP input
7 IAP I IAP input
8 IAM I IAM input
9 VCC3A Power (3.3V) 3.3V Analog Power supply
10 VAM I VAM input
11 VAP I VAP input
12 VCM2 O Reference output
13 VSSA Ground Analog Ground
14 VCCA Power (3,3V) Analog Power Supply
15 RST I Chip Reset active
16 EA I 8051 EA control signal
17 MODE0 I Mode selection bit 0 (LSB)
18 MODE1 I Mode selection bit 1
19 MODE2 I Mode selection bit 2 (MSB)
20 VREG25 O Regulator 2.5V output
21 VCC3A Power (3.3V) 3.3V Analog Power supply
22 GNDIO/GNDK Ground Ground
23 VCC3A Power (3.3V) 3.3V I/O Power supply
24 VLCD O LCD bias power supply output
25 V3 I LCD bias input 3
26 V2 I LCD bias input 2
27 V1 I LCD bias input 1
28 COM0 O LCD COM output
29 COM1 O LCD COM output
30 COM2 O LCD COM output
31 COM3 O LCD COM output
32 SEG0 O LCD segment output