PNI MS2100 - Manual (Page 5)

PNI Sensor 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 DOC # 1011946 R07
21-Jan-11 Page 5 of 16-
MS2100
Specifications & Instructions
Host Processor Interface
All accesses to and from the MS2100 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 5: MS2100 Pad Descriptions
Pad MS2100 Name Function
1 N.C. Not connected
2 RESET Reset input
3 REXT External timing resistor for higher speed clock
4 DRDY Data ready
5 DHST High speed oscillator output. Output is 1/2 clock speed. Used for diagnostics.
6 REXT_GND Connect the pin to ground.
7 APZDRV Optional Z sensor drive output (+)
8 APZIN Optional Z sensor input (+)
9 ANZIN Optional Z sensor input ( –)
10 ANZDRV Optional Z sensor drive output ( –)
11 SSNOT Active low chip select for SPI port
12 MOSI Master Out, Slave In for the module SPI port
13 N.C Not connected
14 MISO Master In, Slave Out for the module SPI port
15 SCLK Serial clock input for SPI port. 1 MHz maximum.
16 VDD Supply Voltage (digital)
17 VDD Supply Voltage (analog)
18 VSTBY Input protection clamp diode common
19 VSS Ground (analog)
20 VSS Ground (digital)