User guide

PNIASIC
HostProcessorInterface
Host Processor Interface
All accesses to and from the PNI ASIC are through a hardware handshaking, synchronous serial interface
that adheres to the Motorola SPI protocol. The interface consists of six signals; SCLK, MOSI, MISO,
SSNOT, RESET and DRDY.
Table 8: Pin Definitions
26 DIE
(pin #)
28 MLF
(pin #)
Pin
Name
I/O
Type
a
Test Type
Parameters Description
1 26 VSTBY DP V
DD
Input protection clamp diode. Connect to V
DD
2 27 SCLK DI IBT
Serial Clock input for SPI port. 1 MHz
maximum (Rext = 100 kHz)
3 28 MISO DO OB2 Serial data output (Master In Slave Out)
4 1 MOSI DI IBA Serial data output (Master Out Slave In)
5 3 SSNOT DI IBA Active low chip select for SPI port
--- 2 Not Connected
6 4 AV
DD
AP V
DD
Supply voltage for analog section
7 5 AV
SS
AP V
SS
Ground pin for analog section
8 6 +ZDRV DO OB3 Z sensor drive output
9 7 +ZIN AI AIB Z sensor sense input
10 8 -ZIN AI AIB Z sensor sense input
11 9 -ZDRV DO OB3 Z sensor drive output
12 10 +YDRV DO OB3 Y sensor drive output
13 11 +YIN AI AIB Y sensor input
14 12 DV
DD
DP V
DD
Supply voltage for digital section
15 13 -YIN AI AIB Y sensor input
16 14 -YDRV DO OB3 Y sensor drive output
17 15 +XDRV DO OB3 X sensor drive output
18 16 +XIN AI AIB X sensor sense input
19 17 -XIN AI AIB X sensor sense input
20 18 -XDRV DO OB3 X sensor drive output
21 19 DV
SS
DP V
SS
Ground pin for digital section
--- 20 Not connected
22 21 COMP DO OB1 Comparator output. Used for diagnostics.
23 22 RESET DI IBA Rest input
24 23 DRDY DO OB1 Data ready
25 24 DHST DIO IOIA
High speed oscillator output. Output is ½
clock speed. Use for diagnostics
26 25 REXT AI AIB
External timing resistor for high speed clock.
100 k ohm typical
Exposed Paddle
(center Pad)
Connect to analog ground
PNICorporation133AviationBlvd.,Suite101,SantaRosa,CA95403‐1084USA;,Fax:(707)566‐2261
Forthemostcurrentspecifications,pleasevisitourwebsiteat:www.pnicorp.com
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