Motorola HT 1000 Appendix . Secure Module, Signal Name Connector Plug Function P1 PIN Number

SPI bus consists of five signal lines. Refer to Appendix Table 1 for the signal information. A communications failure between the host processor and the Secure Module will be indicated as an “ERROR 09/ 10” message on the radio display.

UNSW B+ Vdd

12

SPI CLK	17
	18
SPI TX DATA (MOSI)
	21
EXP SEL 1
	3
2.1MHz REF CLK
ASFIC PRE-EMP out	7
	10
DISCRIMINATOR
DVP WE	16
	15
KEY INSERT DATA
	13
KEY/FAIL
	12
RESET

Interface and Control

Serial Peripheral Interface (SPI)

Encode / Decode

Key Variable Storage

4 11

19SPI RX DATA (MISO)

20EXP INT 1

14 TX AUDIO

9AUX RX

24 CONT 5V

Not Connected: 5,6,8,22,23,25

Appendix Figure 1. Secure Module

MAEPF-26127-O

Appendix A Table 1. MTS 2000 Single Key Secure Module I/O Definition

SIGNAL NAME	CONNECTOR PLUG	FUNCTION
	P1 PIN NUMBER
UNSW B+	1	Unswitched battery voltage
Vdd	2	Switched 5 volt supply
2.1MHz REF CLK	3	2.1/2.4 MHz clock signal
GROUND	4	Ground
ASFIC PRE-EMP out	7	Transmit Clear Audio
AUX RX	9	Receive Clear Audio
DISCRIMINATOR	10	Receive Encrypted Audio
GROUND	11	Ground
RESET	12	Radio Reset - Does NOT reset module
KEY/FAIL	13	Keyloading Signal
TX AUDIO	14	Transmit Encrypted Audio
KEY INSERT DATA	15	Keyloading Signal
DVP WE	16	Keyloading Signal
SPI CLK	17	SPI Data Clock
SPI TX DATA (MOSI)	18	SPI Data from Host
SPI RX DATA (MISO)	19	SPI Data to Host
EXP INT1	20	SPI Secure Interrupt Request
EXP SEL1	21	SPI Secure Slave Select
CONT 5V	24	Continuous 5 Volt Regulator Output (Not Used)
	5,6,8,22,23,25	Not Used

Appendix A- 2