HT46R23/HT46C23
Pad Assignment
HT46C23
P A 4 /T M R
P A 6 /S D A
P A 3 /P F D
P B 4 /A N 4
P B 5 /A N 5
P B 6 /A N 5
P B 7 /A N 7
P A 5 /IN T
P A 1
3 3
P A 2
3 2
3 1
3 0
2 9
2 8
2 7
2 6
2 5
2 4
2 3
P A 0
P B 3 /A N 3
P B 2 /A N 2
P B 1 /A N 1
4
5
2 1
1 9
V S S
V S S
7
6
8
9
1 0
1 1
1 2
1 3
1 4
1 5
2 0
1 8
1 7
1 6
P B 0 /A N 0
3
1
2
2 2
P A 7 /S C L
O S C 2
(0 , 0 )
O S C 1
V D D
V D D
T E S T 3
T E S T 2
T E S T 1
* The IC substrate should be connected to VSS in the PCB layout artwork.
P C 0
P C 1
P C 2
P C 3
P C 4
P D 0 /P W M 0
R E S
P D 1 /P W M 1
Pad Description
Pad Name
PA0~PA2
PA3/PFD
PA4/TMR
PA5/INT
PA6/SDA
PA7/SCL
PB0/AN0
PB1/AN1
PB2/AN2
PB3/AN3
PB4/AN4
PB5/AN5
PB6/AN6
PB7/AN7
PC0~PC4
I/O
Option
Pull-high
Wake-up
PA3 or PFD
I/O or Serial Bus
Description
Bidirectional 8-bit input/output port. Each bit can be configured as wake-up
input by options. Software instructions determine the CMOS output or
Schmitt trigger input with or without pull-high resistor (determined by
pull-high options: bit option). The PFD, TMR and INT are pin-shared with
PA3, PA4 and PA5, respectively. Once the I
2
C Bus function is used, the in-
ternal registers related to PA6 and PA7 can not be used.
I/O
I/O
Pull-high
Bidirectional 8-bit input/output port. Software instructions determine the
CMOS output, Schmitt trigger input with or without pull-high resistor (deter-
mined by pull-high: port option) or A/D input.
Once a PB line is selected as an A/D input (by using software control), the
I/O function and pull-high resistor are disabled automatically.
I/O
Pull-high
Bidirectional 5-bit input/output port. Software instructions determine the
CMOS output, Schmitt trigger input with or without pull-high resistor (deter-
mine by pull-high option: port option).
Rev. 1.40
3
September 3, 2003
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
