10 / 116 page
7 x 7 VFBGA Package Information
BC352239A-ds-001Pc
© Cambridge Silicon Radio Limited 2004
Production Information
Page 10 of 116
2.2
Device Terminal Functions
Radio
Ball
Pad Type
Description
AUX_DAC
D2
Analogue
Voltage DAC output
PIO[0]/RXEN
C1
Bi-directional with
programmable strength
internal pull-up/down
Control output for external Tx/Rx switch (if
fitted)
PIO[1]/TXEN
B1
Bi-directional with
programmable strength
internal pull-up/down
Control output for external PA (If fitted)
RF_IN
E1
Analogue
Single ended receiver input
TX_A
G1
Analogue
Transmitter output/switched receiver input
TX_B
F1
Analogue
Complement of TX_A
Synthesiser and
Oscillator
Ball
Pad Type
Description
XTAL_IN
N1
Analogue
For crystal or external clock input
XTAL_OUT
N2
Analogue
Drive for crystal
USB and UART
Ball
Pad Type
Description
UART_TX
J12
CMOS output, tri-state, with
weak internal pull-up
UART data output
UART_RX
K11
CMOS input with weak
internal pull-down
UART data input
UART_RTS
L12
CMOS output, tri-state, with
weak internal pull-up
UART request to send active low
UART_CTS
K12
CMOS input with weak
internal pull-down
UART clear to send active low
USB_DP
L13
Bi-directional
USB data plus with selectable internal
1.5k
Ω pull-up resistor
USB_DN
K13
Bi-directional
USB data minus
PCM Interface
(1)
Ball
Pad Type
Description
PCM_OUT
G13
CMOS output, tri-state, with
weak internal pull-down
Synchronous data output
PCM_IN
J11
CMOS input, with weak
internal pull-down
Synchronous data input
PCM_SYNC
H11
Bi-directional with weak
internal pull-down
Synchronous data sync
PCM_CLK
H13
Bi-directional with weak
internal pull-down
Synchronous data clock
Note:
(1)
Pin names may be redefined dependent on chosen interface; see Table 6.1.