HT46R22/HT46C22
Pad Assignment
HT46C22
P A 4 /T M R
P A 3 /P . D
P B 7 /A N 7
P B 6 /A N 6
P B 5 /A N 5
P B 4 /A N 4
P A 5 /IN T
P A 2
P A 1
1
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 9
P A 0
2
3
4
5
6
7
8
9
P C 0
V S S
1 8
P B 3 /A N 3
P B 2 /A N 2
P B 1 /A N 1
P B 0 /A N 0
(0 ,0 )
P A 6 /S D A
P A 7 /S C L
O S C 2
O S C 1
V S S
1 0
P C 1
1 1
P D 0 /P W M
1 2
R E S
1 3
V D D
1 5 V D D
1 4 1 6 1 7
T E S T 1
T E S T 3
T E S T 2
* The IC substrate should be connected to VSS in the PCB layout artwork.
Pad Description
Pad Name
PB0/AN0
PB1/AN1
PB2/AN2
PB3/AN3
PB4/AN4
PB5/AN5
PB6/AN6
PB7/AN7
PA0~PA2
PA3/PFD
PA4/TMR
PA5/INT
PA6/SDA
PA7/SCL
VSS
PC0~PC1
I/O
Options
Description
Bidirectional 8-bit input/output port. Software instructions deter-
mine the CMOS output, Schmitt trigger input with or without
pull-high resistor (determined by pull-high option: 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 auto-
matically.
I/O
Pull-high
I/O
Bidirectional 8-bit input/output port. Each bit can be configured as
wake-up input by options. Software instructions determine the
Pull-high
CMOS output or Schmitt trigger input with or without pull-high resis-
Wake-up
tor (determined by pull-high options: bit option). The PFD, TMR and
PA3 or PFD
INT are pin-shared with PA3, PA4 and PA5, respectively. Once
I/O or Serial Bus
the I
2
C BUS function is used, the internal registers related to PA6
and PA7 can not be used.
¾
Pull-high
Negative power supply, ground.
Bidirectional 2-bit input/output port. Software instructions deter-
mine the CMOS output, Schmitt trigger input with or without
pull-high resistor (determine by pull-high option: port option).
¾
I/O
Rev. 1.10
3
October 2, 2002
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
