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9.3 Signal Descriptions
Table 8
provides the signal name, type, and description for each CYW43903 ball. The symbols shown under Type indicate pin
directions (I/O = bidirectional, I = input, and O = output) and the internal pull-up/pull-down characteristics (PU = weak internal pull-up
resistor and PD = weak internal pull-down resistor), if any.
Table 8. Signal Descriptions
Ball Number
C8
B9
P6
P7
M8
H2
J2
E1
D1
G10
G12
F10
F11
F12
E5
D9
E2
C1
B1
C6
E8
A3
A2
C2
L2, L5, M3, M4, M5, N2, N3, N7,
P4
M11, K11, H10, D10, J9, G9, F9,
C9, L8, F8, D8, G7, D7, J6, F6,
J5, K4, G4, G3, E3, C3, K2, G2,
D2, B2, K1
A12
C10
M7
Document Number: 002-14826 Rev. *G
PRELIMINARY
Signal Name
Cypress Serial Control (CSC) Interfaces
2
I
C0_CLK
2
I
C0_SDATA
WRF_XTAL_XOP
WRF_XTAL_XON
LPO_XTAL_IN
HIB_XTALIN
HIB_XTALOUT
GPIO Interface (WLAN)
GPIO_0
GPIO_1
GPIO_2
GPIO_3
GPIO_4
GPIO_5
GPIO_6
GPIO_7
GPIO_8
GPIO_9
GPIO_10
GPIO_11
GPIO_12
GPIO_13
GPIO_14
GPIO_15
GPIO_16
WRF_AFE_GND
VSSC
SR_PVSS
PMU_AVSS
AVSS
Type
O
CSC master clock.
I/O
CSC serial data
Clocks
I
XTAL oscillator input.
O
XTAL oscillator output.
I
External sleep clock input (32.768 kHz).
I
3.3V 32 kHz crystal input
O
3.3V 32 kHz crystal output
I/O
I/O
I/O
I/O
I/O
I/O
Programmable GPIO pins.
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Ground
GND
AFE ground
GND
Core ground for WLAN and APP sections
GND
Power ground
GND
Quiet ground
GND
Baseband PLL ground
CYW43903
Description
Page 30 of 65
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