[AK1542A]
4. Pin Functional Description
Table 1 Pin Functions
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Note 1)
Name
CPVDD
TEST3
TEST1
LE
DATA
CLK
LD
PDN2
PDN1
REFIN
TEST2
GPO1
GPO2
DVSS
VREF
RFINN
RFINP
PVDD
BIAS
PVSS
CP
CPZ
SWIN
CPVSS
I/O
P
DI
DI
DI
DI
DI
DO
DI
DI
AI
DI
DO
DO
G
AO
AI
AI
P
AIO
G
AO
AIO
AI
G
Pin Functions
Power supply for charge pump
Test pin 3, This pin must be connected to ground.
Test pin 1, This pin must be connected to ground.
Load enable
Serial data input
Serial clock
Lock detect
Power down pin for PLL
Power down signal for LDO
Reference input
Test pin 2, This pin must be connected to ground.
General-purpose output pin 1
General-purpose output pin 2
Digital ground pin
Connect to LDO reference voltage capacitor
Prescaler input
Prescaler input
Power supply for peripherals
Resistance pin for setting charge pump current
Ground pin for peripherals
Charge pump output
Connect to the loop filter capacitor
Connect to resistance pin for fast Lock Up
Ground pin for charge pump power supply
“Hi-Z”
Notes 1) & 2)
Notes 1) & 2)
“Low”
“Low”
“Low”
Internal pull-down,
Schmidt trigger input
Internal pull-down,
Schmidt trigger input
Internal pull-down,
Schmidt trigger input
Schmidt trigger input
Schmidt trigger input
Schmidt trigger input
Power down
Remarks
“Low”
Schmidt trigger input
Schmidt trigger input
For detailed functional descriptions, see the section “Charge Pump and Loop Filter” in “8. Block Functional
Descriptions”.
MS1399-E-00
-4-
2012/3
AKM [ ASAHI KASEI MICROSYSTEMS ]
