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Pin #
Signal Name
69
EARPIECE+
70
KEYB_DRV
All identical names for 70/36/28-pin connectors correspond to the same signal.
All UART names are referenced to PC, as the c18 is a DCE device.
Note
4.2
36-PIN ZIF INTERFACE CONNECTOR
Table 17 shows the pin assignments for c18 models using a 36-pin ZIF interface connector
Pin #
Signal Name
1
USB_VBUS
2
USB_D+
3
USB_D-
4
UART1_TXD
5
UART1_RXD
6
UART1_DTR
7
UART1_DCD
8
UART1_RTS
9
UART1_CTS
10
UART1_DSR
11
UART1_RI
12
UART2_TXD
13
AUDIO_IN
14
AUDIO_OUT_ONOFF
98-08901C63-A
Table 16. 70-pin Connector Pinout (Continued)
Signal Level [V]
2.8
Table 17. 36-pin ZIF Connector Pinout
Signal Level [V]
4.4 – 5.25
3.3
3.3
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
1.28 Vp-p
1.06 Vp-p
I/O
Differential (+) earpiece output. Low
O
impedance (32
common mode 1.2 V.
Current sink for keypad LED backlight
O – Sink
(up to at least 36 mA).
.
I/O
I
USB power, 5.0V nominal.
I/O
USB D+ signal.
I/O
USB D- signal.
I
5V tolerant (from PC to OEM).
O
From OEM to PC.
I
5V tolerant.
O
I
5V tolerant.
O
O
O
I
5V tolerant (from PC to OEM).
Analog Audio_In. Input impedance:
I
greater than 10kΩ.
I/O
Analog Audio_Out and on/off.
Connector Pin Assignments
Description
Ω
), 35 mW maximum,
Description
43
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