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CSP Package Information
BC41B143A-ds-002Pd
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Production Information
© Cambridge Silicon Radio Limited 2005
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3.2
BC41B143AXX-IXF Device Terminal Functions
Radio
Ball
Pad Type
Description
RF_A
E2
Analogue
Transmitter output/switched receiver input
RF_B
E1
Analogue
Complement of RF_A
AUX_DAC
D2
Analogue
Voltage DAC
Synthesiser and
Oscillator
Ball
Pad Type
Description
XTAL_IN
A3
Analogue
For crystal or external clock input
XTAL_OUT
B3
Analogue
Drive for crystal
PCM Interface
Ball
Pad Type
Description
PCM_OUT
E4
CMOS output, tri-statable
with weak internal pull-
down
Synchronous data output
PCM_IN
B7
CMOS input, with weak
internal pull-down
Synchronous data input
PCM_SYNC
D5
Bi-directional with weak
internal pull-down
Synchronous data sync
PCM_CLK
B6
Bi-directional with weak
internal pull-down
Synchronous data clock
USB and UART
Ball
Pad Type
Description
UART_TX
C5
CMOS output, tri-statable
with weak internal pull-up
UART data output active high
UART_RX
D4
CMOS input with weak
internal pull-down
UART data input active high
UART_RTS
A7
CMOS output, tri-statable
with weak internal pull-up
UART request to send active low
UART_CTS
C4
CMOS input with weak
internal pull-down
UART clear to send active low
USB_DP
B5
Bi-directional
USB data plus with selectable internal
1.5k
Ω Pull-up resistor
USB_DN
A6
Bi-directional
USB data minus