S1M8653B Samsung Semiconductor, Inc., S1M8653B Datasheet - Page 7

• Manufacturer Part Number: S1M8653B
• Manufacturer: Samsung Semiconductor, Inc.

BASEBAND ANALOG PROCESSOR
PIN DESCRIPTION (Continued)
30,31,32,3
3,34,35,36,
Pin No.
27, 28
40–47
29
37
38
39
48
49
50
51
52
TXD0–TXD7
Symbol
TCXO/4
CHIPx8
TXCLK
TXCLK
GNC
GND
GND
GND
V
V
DD
DD
Type
O
O
P
P
P
P
P
–
I
I
I
Equivalent Circuit
40
41
42
43
44
45
46
47
48
49
29
52
These pins are used during testing.
Connect to analog GND.
A clock frequency equal to 1/4 of the TCXO
frequency is output on this pin in all
operating modes.
These pins are used during testing.
Connect to analog GND.
Digital Power.
Digital GND.
Transmit data input pins for transmit 8-bit
D/A converter TXD7 is the MSB.
Complementary inputs to transmit D/A
converter.
Digital Ground.
Digital Power.
The CHIPx8 synthesizer is a digital divider
with a ratio of 512/1025 times the TCXO
input frequency. As such, it will have an
average output frequency of 9.8304MHz,
but will not have an exact 50% duty cycle.
When the CHIPx8 synthesizer is disabled
(CDMA SLEEP and FM RX modes) the
CHIPx8 signal is pulled to a logic low.
Description
S1M8653B
7