cx25840 Conexant Systems, Inc., cx25840 Datasheet - Page 22

• Manufacturer Part Number: cx25840
• Description: Video Decoder And Broadcast Audio
• Manufacturer: Conexant Systems, Inc.

Pin Descriptions
Table 2-1. Pin Descriptions (4 of 4)
2-4
GENERAL NOTE:
1. All signal I/O are LVTTL compatible.
2. All inputs are Schmitt unless otherwise noted.
3. All outputs have drive capability I
IRQ_N/PRGM4
RESET_N
SLEEP
TEST
SA_BCLK_IN
SA_WCLK_IN
SA_SDIN
SA_BCLK_OUT
SA_WCLK_OUT
SA_SDOUT
GPIO{0:1}/
PRGM{8:9}
R
Od
As
Ap
Dp
Ar
D
Pin Name
Pin Name
Pin Name
10
2
3
1
43
42
44
41
40
39
7, 4
Active resistive pullup
Open-drain pads with glitch filters
Analog signal
Analog power or ground
Digital power or ground
Analog reference, for connection to external component
Digital Signal
Pin
Pin
Pin
O
I
I
I
I/O
I/O
I
I/O
I/O
O
I/O
Dir
Dir
Dir
OL
D, R
D
D
D
D
D
D
D
D
D
D
= 4 mA unless otherwise noted.
Type
Type
Type
Interrupt output, active low. Can also be configured for GPIO and video timing
control if interrupt not needed. In VIP Host port mode, this also acts as the VIRQ_N
signal. Also acts as a pin strap option during reset. If the pin is low during the
deassertion of RESET_N the device will respond to the alternate two-wire serial
communications address:
0x8C/0x8D when CHIP_SEL/VIPCLK/VIPCLK pin is low
0x8E/0x8F when CHIP_SEL/VIPCLK/VIPCLK pin is high
If the pin is high during the deassertion of RESET_N the device will respond to the
default two-wire serial communications addresses:
0x88/x89 when CHIP_SEL/VIPCLK pin is low
0x8A/0x8B when CHIP_SEL/VIPCLK pin is high
Global chip reset, active low.
A logic high state on this pin puts the chip in power-down mode.
Puts chip in test mode. Pin is tied low for normal operation.
Serial audio bit clock for input data.
Serial audio word/framing clock for delineating input sample boundaries.
Serial audio data input.
Serial audio bit clock for output data.
Serial audio word/framing clock for delineating output sample boundaries.
Serial audio data output.
Configurable Multifunction Status/Control Pins.
Legend for Pin Type
Conexant
Description: {6} Serial Digital Audio
Description: {4} Chip Control
Description: {2} GPIO
CX25840/1/2/3 Data Sheet
102284B
8/3/05