参数资料
型号: MB90488BPFV
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP100
封装: 14 X 14 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-100
文件页数: 97/124页
文件大小: 1547K
代理商: MB90488BPFV
MB90480B/485B Series
74
18. External Bus Pin Control Circuit
The external bus pin control circuit controls the external bus pins used to expand the CPU address/data bus
connections to external circuits.
(1) Register List
(2) Block Diagram
Auto ready function select register (ARSR)
External address output control register (HACR)
Bus control signal select register (EPCR)
Initial value
Address : 0000A5H
0011--00B
Initial value
Address : 0000A6H
********B
Initial value
Address : 0000A7H
1000*10-B
W
*
: Write only
: Not used
: May be either “1” or “0”
WW
W
WW
15
14
13
12
11
10
9
8
IOR0
W
IOR1
HMR1
HMR0
LMR1
LMR0
W
WWW
76
5
4
3
2
1
0
E22
W
E23
E21
E20
E19
E18
E17
E16
WW
W
15
14
13
12
11
10
9
8
RYE
W
CKE
HDE
IOBS
HMBS
WRE
LMBS
P3
P2
P1
P0
P5
RB
P4
P5
Data control
Address control
Access control
P0 data
P0 direction
Access control
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