EM73962A
4-BIT MICROCONTROLLER
EM73962A I/O PORT DESCRIPTION :
Port
Input function
Output function
Note
0
1
2
3
4
5
6
7
8
E
Input port , wakeup function
--
--
--
--
--
--
--
--
--
I
P3(1..0) : ROM bank selection
--
--
--
--
E
Input port, wakeup function,
external interrupt input
E
I
Output port
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
--
--
--
--
--
--
--
P9.3 : RAM bank selection
--
--
--
--
--
--
Sleep/Hold mode control register
Sound effect volume control register
--
--
--
--
--
Sound effect frequency register
Sound effect command register
Timebase control register
--
LCD control register
Timer/counter A control register
Timer/counter B control register
Sound effect command register
--
I
I
I
I
I
lownibble
highnibble
I
I
I
I
* This specification are subject to be changed without notice.
10.8.2001
23
ELAN [ ELAN MICROELECTRONICS CORP ]
