[AK1548]
4. Pin Functional Description and Assignments
1. Pin Functions
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Name
CPVSS
TEST1
AVSS
RFINN
RFINP
AVDD
VREF1
REFIN
PVSS
TEST2
PDN
CLK
DATA
LE
LD
PVDD
VREF2
CPVDD
BIAS
CP
I/O
G
DI
G
AI
AI
P
AO
AI
G
DI
DI
DI
DI
DI
DO
P
AO
P
AIO
AO
Pin Functions
Charge pump ground
Test pin 1
Analog ground
Complementary input to the RF Prescaler
Input to the RF Prescaler
Power supply for analog blocks
Connect reference voltage capacitor for LDO
Reference signal input
Peripherals ground
Test pin 2
Power down
Serial clock input
Serial data input
Load enable input
Lock detect output
Power supply for peripherals
Connect reference voltage capacitor
Power supply for charge pump
Resistance pin for setting charge pump current
Charge pump output
“Hi-Z”
“Low”
“Low”
Schmidt trigger input
Schmidt trigger input
Schmidt trigger input
Internal pull-down,
Schmidt trigger input
“Low”
Internal pull-down,
Schmidt trigger input
Power down
(Note 1)
Remarks
Note 1)
Note 2)
“Power Down” means the state of [PDN]=”Low” after power on.
The exposed pad at the center of the backside should be connected to ground.
The following table shows the meaning of abbreviations used in the “I/O” column.
AI: Analog input pin
DO: Digital output pin
AO: Analog output pin
P: Power supply pin
AIO: Analog I/O pin
G: Ground pin
DI: Digital input pin
MS1364-E-00
4
2012/1
AKM [ ASAHI KASEI MICROSYSTEMS ]
