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SECTION 5
DIAGRAMS
5-1. IC PIN DESCRIPTIONS
• IC501 SB662104A-4L43-TLM (SYSTEM CONTROL) (BASE UNIT)
Pin No.
Pin Name
I/O
Pin Description
1
STB
O
Strobe signal output to PLL.
2
DATA
O
Serial data output to PLL.
3
CLK
O
Serial clock output to PLL.
4
RX-DATA
I
RX data input
5
SIG-IN
I
RSSI/PLL-LOCK signal input (L: RSSI, H: PLL-LOCK)
6
H-MUTE
O
Half mute control output (L: Mute ON)
7
TX-DATA
O
TX data, external system alarm output
8
VSS
—
Ground
9
OSC2
O
Crystal oscillation output (4.048 MHz)
10
OSC1
I
Crystal oscillation input (4.048 MHz)
11
VDD
—
Power supply pin (+3 V)
12
RESET
I
System reset input (L: Reset)
13
TEST
I
Test pin (Connect to ground in this set.)
14
POW-DET
I
Power failure detection input (L: Power failure)
15
MBR
I
Make 30/40 (%) select input (H: 30%, L: 40%)
16
PAGE
I
HANDSET LOCATOR input (H: input)
17
DIAL MODE
I
DIAL MODE select input
18
CHG-DET
I
Charge detection input (L: Charge)
19
RSSI H/L
O
RSSI sensitivity select output (L: Low sensitivity)
20
DP
O
Dial pulse ON/OFF control output
21
DTMF
O
DTMF generator output
22
TX +B CTRL
I
TX B+ ON/OFF control input (L: TX ON)
23 – 26
M1 – 4
I
Channel setting for test mode 1 – 4.
27 – 29
TEST3 – 1
I
Test mode setting 3 – 1
30
RING
I
Ring detection input (L: Ring input)
