AT73C237_14 Datasheet, PDF (3/33 Pages) ATMEL Corporation – Applications: GPS Modules, WLAN Devices, Wireless Modules

AT73C237
3. Pin Description
Table 3-1.
Pin Name
XRESIN
VO3
VDD3
XRESO
VO4
GNDD
VDD4
VZAP⁽¹⁾
VDD2
VO2
Pin Description
I/O
Pin Number
Input
1
Output
2
Input
3
Output
4
Output
5
GND
6
Input
7
Input
8
Input
9
Output
10
TWCK⁽²⁾
Input
11
TWD⁽³⁾
VDD1⁽⁴⁾
Input
12
Input
13
VO1
Output
14
GNDA/AVSS GND/Input
15
VBG
Output
16
Type
Digital
Analog
Power
Digital
Analog
Power
Power
Digital
Power
Analog
Digital
Digital
Power
Analog
Analog
Analog
Function
Reset in pin
LDO3 output voltage
LDO3 input voltage
Reset out pin
LDO4 output voltage
Digital ground
LDO4 input voltage
Reserved for manufacturing purposes.
LDO2 input voltage
LDO2 output voltage
TWI input clock or LDO1,2,3 enable at
logic “1“, disable at “0“
TWI input/output or tied to Vdd
LDO1 input voltage
LDO1 output voltage
Analog ground and ESD ground
Voltage reference for analog cells
Note:
1. Connect to ground (via an internal pull-down)
2. Connected to VDD1, 2 or 3 on AT73C237.
3. Connected to VDD1, 2 or 3 on AT73C237.
4. VDD1, 2, 3 should have the same input voltage.
3
6362A–PMAAC–01-Jul-08