BELASIGNA 250
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9
Table 4. CABGA PIN DESCRIPTIONS (continued) Pad Index
A/D
I/O
Description
BELASIGNA 250 Pad Name
H1
CAP0
Charge pump capacitor connection
N/A
A
G1
CAP1
Charge pump capacitor connection
N/A
A
J2
AI0
Microphone input
I
A
H3
AI1/LOUT
Microphone input / lineout audio output
I/O
A
J4
AI2
Microphone input
I
A
H4
AI3
Microphone input
I
A
J3
AIR
Audio input reference
N/A
A
G9
RCVR0+
Digital output 0 positive output
O
A
H9
RCVR0
Digital output 0 negative output
O
A
J9
AO0/RCVR1+
Analog output 0 / digital output 1 positive output
O
A
J8
AO1/RCVR1
Analog output 1 / digital output 1 negative output
O
A
J7
AOR
Analog output reference
N/A
A
B9
DEBUG_RX
RS232 serial input
I
D
A9
DEBUG_TX
RS232 serial output
O
D
C9
EXT_CLK
External clock input / internal clock output
I/O
D
A7
TWSS_CLK
Twowire synchronous serial clock
I/O
D
A8
TWSS_DATA
Twowire synchronous serial data
I/O
D
E8
GPIO[0] / I2S_FD
Generalpurpose input or output / I2S digital frame
I/O
D
E9
GPIO[1] / I2S_IND
Generalpurpose input or output / I2S digital input
I/O
D
F8
GPIO[2] / I2S_INA
Generalpurpose input or output / I2S analog input
I/O
D
F9
GPIO[3] / NCLK_DIV_RESET / I2S_FA
Generalpurpose input or output / I2S analog frame
I/O
D
D2
GPIO[4] / LSAD [0] / I2S_OUTD
Generalpurpose input or output / lowspeed A/D input /
I2S digital output
I/O
A/D
D1
GPIO[5] / LSAD[1] / I2S_OUTA
Generalpurpose input or output / lowspeed A/D input /
I2S analog output
I/O
A/D
C1
GPIO[6] / LSAD[2]
Generalpurpose input or output / lowspeed A/D input
I/O
A/D
B1
GPIO[7] / LSAD[3]
Generalpurpose input or output / lowspeed A/D input
I/O
A/D
A1
GPIO[8] / LSAD[4] / UART_TX
Generalpurpose input or output / lowspeed A/D input /
UART output
I/O
A/D
A2
GPIO[9] / LSAD[5] / UART_RX
Generalpurpose input or output / lowspeed A/D input /
UART input
I/O
A/D
A3
GPIO[10] / UCLK
Generalpurpose input or output / user clock
I/O
D
B4
GPIO[11] / PCM_CLK
Generalpurpose input or output / PCM clock
I/O
D
A4
GPIO[12] / PCM_SERI
Generalpurpose input or output / PCM serial input
I/O
D
B5
GPIO[13] / PCM_SERO
Generalpurpose input or output / PCM serial output
I/O
D
A5
GPIO[14] / PCM_FRAME
Generalpurpose input or output / PCM frame
I/O
D
A6
GPIO[15]
Generalpurpose input or output
I/O
D
NOTE: There are 9 unlisted pads that must be left unconnected. (B2, B3, B6, B7, B8, C2, D8, E2, H2)