Table 3-3. Port Expander Pin Settings - Motorola APX 7000 Detailed Service Manual

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3.1.4.8 Port Expander
U703 is a port expander that is controlled by the auxiliary SPI of the Trident IC; pins A7
(ASPI_DATA), B7 (ASPI_CLK) and C6 (ACE1_GPO7). Data sent on the main SPI bus with a specific
header, tells the Trident IC to pass the data (via the auxiliary SPI lines) onto the port expander SPI
lines, pins 32 (SCLK), 33 (DIN) and 34 (CS). The port expander then translates this auxiliary SPI
data and turns on and off the select lines for the various VCOs, switches (that select the correct RF
path for either VHF, UHF or 7/800) and other logic external to the FGU.
logic settings for the port expander for the various bands.
PIN NO.
LOGIC
VHF TX
PIN NO.
LOGIC
PIN NO.
VHF RX
LOGIC
PIN NO.
LOGIC
PIN NO.
700 TX
LOGIC
PIN NO.
LOGIC
PIN NO.
700 RX
LOGIC
PIN NO.
LOGIC
PIN NO.
7/800 TX
LOGIC
PIN NO.
LOGIC
PIN NO.
800 TX
LOGIC
PIN NO.
LOGIC
PIN NO.
800 RX
LOGIC
PIN NO.
LOGIC

Table 3-3. Port Expander Pin Settings

1 2 3 4 5
0 0 0 0 0
16 17 18 19 21
0 H 0 0 0
1 2 3 4 5
H H H H 0
16 17 18 19 21
0 0 0 0 0
1 2 3 4 5
0 0 0 0 H
16 17 18 19 21
0 0 0 0 0
1 2 3 4 5
0 0 H 0 H
16 17 18 19 21
0 0 0 0 0
1 2 3 4 5
H 0 0 0 0
16 17 18 19 21
0 0 0 0 0
1 2 3 4 5
0 0 0 0 H
16 17 18 19 21
0 0 0 0 0
1 2 3 4 5
0 0 H 0 H
16 17 18 19 21
0 0 0 0 0
Theory of Operation: Transceiver Board
6 7 8 9 10
0 H H 0 0
22 23 24 25 26
H H H 0 H
6 7 8 9 10
0 0 0 0 0
22 23 24 25 26
H 0 0 0 0
6 7 8 9 10
0 0 0 H 0
22 23 24 25 26
H 0 0 0 0
6 7 8 9 10
0 0 0 0 H
22 23 24 25 26
H 0 0 0 0
6 7 8 9 10
H 0 0 0 0
22 23 24 25 26
H 0 0 0 0
6 7 8 9 10
0 0 0 0 H
22 23 24 25 26
H 0 0 0 0
6 7 8 9 10
0 0 0 H 0
22 23 24 25 26
H 0 0 H 0
Table 3-3 below shows the
12 13 14 15
0 0 0 0
27 28 29 30
0 0 0 0
12 13 14 15
0 0 0 0
27 28 29 30
0 0 0 0
12 13 14 15
0 0 0 0
27 28 29 30
H H 0 0
12 13 14 15
0 0 0 0
27 28 29 30
0 0 0 H
12 13 14 15
0 0 0 0
27 28 29 30
H H 0 0
12 13 14 15
0 0 0 0
27 28 29 30
H H 0 0
12 13 14 15
0 0 0 0
27 28 29 30
0 0 0 H