RDC
®
RISC DSP Controller
R8810LV
RDC Semiconductor Co.
Rev:1.2
Subject to change without notice
71
PIO Unit
R8810 provides 32 programmable I/O signals, which are multi-function pins with others normal function signals. Software is
programmed through the registers ( 7Ah, 78h, 76h, 74h, 72h, 70h) to configure the multi-function pins for PIO or normal
function.
PIO multi-function Pin list table
PIO No.
Pin No.
Multi Function
Reset status/PIO internal resister
0
72
TMRIN1
Input with 10k pull-up
1
73
TMROUT1
Input with 10k pull-down
2
59
6
PCS /A2
Input with 10k pull-up
3
60
5
PCS /A1
Input with 10k pull-up
4
48
DT/
R
Normal operation/ Input with 10k pull-up
5
49
DEN
Normal operation/ Input with 10k pull-up
6
46
SRDY
Normal operation/ Input with 10k pull-down
7
22
A17
Normal operation/ Input with 10k pull-up
8
20
A18
Normal operation/ Input with 10k pull-up
9
19
A19
Normal operation/ Input with 10k pull-up
10
74
TMROUT0
Input with 10k pull-down
11
75
TMRIN0
Input with 10k pull-up
12
77
DRQ0
Input with 10k pull-up
13
76
DRQ1
Input with 10k pull-up
14
50
0
MCS
Input with 10k pull-up
15
51
1
MCS
Input with 10k pull-up
16
66
0
PCS
Input with 10k pull-up
17
65
1
PCS
Input with 10k pull-up
D
Q
D
Q
OE
Write
PDATA
VCC
VCC
For internal
pull-up
For internal
pull-down
Pin
"0":un-normal function
Normal Data In
Read
PDATA
Microprocessor
Clock
PIO
Direction
PIO
Mode
Normal Function
PIO Data In/Out
PIO pin Operation Diagram