HT9320
Pulse number table
Keypad
Digit Key
1
2
3
4
5
6
7
8
9
0
*/T
#
Output Pulse Number
N
1
2
3
4
5
6
7
8
9
10
P®T
Ignored
10-N
9
8
7
6
5
4
3
2
1
10
P®T
Ignored
N+1
2
3
4
5
6
7
8
9
10
1
P®T
Ignored
On/Off hook store selection table
HST Pin
VDD (HT9320A/H)
Floating (HT9320A)
VSS (HT9320H)
Lock function (HT932L)
This function aims to detect lock dialing num-
bers to prevent from an unauthorized long dis-
tance call. The dialing output of this chip is
disabled if the first input key after on-off hook is
the lock number when the lock function is en-
abled.
International direct dialing lock (IDD lock) se-
lection table
R
K51
R
K61
R
K71
No
No
No
Yes
No
No
Yes
¾
No
Yes
¾
¾
Lock Function
Normal dialing without
lock function
To lock 0
To lock 0, 9
IDD lock operation by the
telephone keyboard.
(See keyboard operation)
Hook Store Mode
On-hook store
Off-hook store
Off-hook store
DOUT BCD code
When dialing, the corresponding 4-bit BCD
codes are serially presented on DOUT from
MSB to LSB. The data of DOUT is valid at the
falling edge of the CLOCK pin. The following
table lists the BCD codes corresponding to the
keyboard input.
Key-In BCD Code Key-In BCD Code
1
2
3
4
5
6
7
0001
0010
0011
0100
0101
0110
0111
8
9
0
*/T
#
F
P
1000
1001
1010
1101
1100
1011
1110
Note:
²¾²
stands for
²don¢t
care²
Hand-free function operation
·
Hand-free function execution
When HFO is low, a rising edge triggers the
HFI, enabling the Hand-free function (HFO
becomes high).
·
Reset Hand-free function
When HFO is high, the Hand-free function is
enabled and can be reset by:
¨
Off-hook
¨
Applying a rising edge to HFI
¨
Changing the HDO pin from low to high
On hook store (HT9320A/H)
When the external power supply (2V~5.5V) is
used and the HST pin is connected to VDD, the
user can store dialing numbers to the memories
(M1~M20) during on-hook state.
13
July 21, 1999
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
