XW-HTD640
67
5
7
8
5
6
7
8
C
D
F
A
B
E
Pin Function (1/2)
Pin
No
Name
Functional
Grouping
IO Type
Description
11
CHANNELSEL
System
Input
Push button Channel Select pin
12
CHANNELBIT0
System
Output
Channel Number Bit 0
13 GND Ground NA
Ground
14
READY
System
Output
Chip ready status signal (active
high) ñ Open Drain
15
IDTX
System
Input
ID Broadcast mode
16
ERRORIN
System
Input
Audio Error signal ñ Active High
(default)
17 READYI/ERRORI
System
Output
Configurable
READYN
or
ERRORN
signal
18 GND Ground NA
Ground
19
CAL
ADC
Output
ADC Calibration Signal
20 GND Ground NA
Ground
21 TVKEY1 Forward
Link
Input
Input Forward Virtual Key 1
22 TVKEY2 Forward
Link
Input
Input Forward Virtual Key 2
23 TVKEY3 Forward
Link
Input
Input Forward Virtual Key 3
24 TVKEY4 Forward
Link
Input
Input Forward Virtual Key 4
Power NA
3.3
V
Serial
EEPROM
Input
Serial Data Output from Serial
EEPROM
Serial
EEPROM
Output
Serial Data Input to Serial EEPROM
Serial
EEPROM
Output
Serial Clock Input to Serial
EEPROM
29 ECS
Serial
EEPROM
Output
Chip Select to Serial EEPROM
(active low)
30 GND Ground NA
Ground
1
EEPROM
System
Input
Indicate the usage of a external
serial EEPROM,
1 => serial EEPROM is present
0 => serial EEPROM is absent, use
system default settings upon power
up
2 PD Power
Management
Input Power
Down
pin
3
CLKIN
System
Input
24.576MHz crystal pad input
4 GND Ground NA
Ground
5
CLKOUT
System
Output
24.576MHz crystal pad output
6
TESTN
TEST
Input
Test Mode Select
7
RESETN
System
Input
Master reset ñ Active Low
8 VCC Power NA
3.3
V
9
VOLUP
System
Input
Push button Digital Volume Up pin
10
VOLDOWN
System
Input
Push button Digital Volume Down
pin
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