si4330 Silicon Laboratories, si4330 Datasheet - Page 83

• Manufacturer Part Number: si4330
• Description: Si4330 Ism Receiver
• Manufacturer: Silicon Laboratories

Register 0Ch. GPIO Configuration 1
Reset value = 00000000
Name
Type
Bit
7:6
4:0
Bit
5
gpiodrv1[1:0] GPIO Driving Capability Setting.
gpio1[4:0]
Name
pup1
D7
gpiodrv1[1:0]
R/W
Pullup Resistor Enable on GPIO1.
When set to 1 the a 200 kresistor is connected internally between VDD and the pin if the
GPIO is configured as a digital input.
GPIO1 pin Function Select.
00000:
00001:
00010:
00011:
00100:
00101:
00110:
00111:
01000:
01001:
01010:
01011:
01100:
01101:
01110:
01111:
10000:
10001:
10010:
10011:
10100:
10101:
10110:
10111:
11000:
11001:
11010:
11011:
11100:
11101:
else :
D6
Inverted Power-On-Reset (output)
Wake-Up Timer: 1 when WUT has expired (output)
Low Battery Detect: 1 when battery is below threshold setting (output)
Direct Digital Input
External Interrupt, falling edge (input)
External Interrupt, rising edge (input)
External Interrupt, state change (input)
ADC Analog Input
Reserved (Analog Test N Input)
Reserved (Analog Test P Input)
Direct Digital Output
Reserved (Digital Test Output)
Reserved (Analog Test N Output)
Reserved (Analog Test P Output)
Reference Voltage (output)
RX Data CLK output to be used in conjunction with RX Data pin (output)
Reserved
External Retransmission Request (input)
Reserved
Reserved
RX Data (output)
RX State (output)
RX FIFO Almost Full (output)
Antenna 1 Switch used for antenna diversity (output)
Antenna 2 Switch used for antenna diversity (output)
Valid Preamble Detected (output)
Invalid Preamble Detected (output)
Sync Word Detected (output)
Clear Channel Assessment (output)
VDD
GND
pup1
R/W
D5
Preliminary Rev 0.2
D4
Function
D3
gpio1[4:0]
R/W
D2
D1
Si4330
D0
83