參數(shù)資料
型號(hào): MB90F654APFV
元件分類(lèi): 微控制器/微處理器
英文描述: 16-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP100
封裝: PLASTIC, LQFP-100
文件頁(yè)數(shù): 67/106頁(yè)
文件大小: 873K
代理商: MB90F654APFV
MB90650A Series
63
13. External Bus Pin Control Circuit
The external bus pin control circuit controls the external bus pins required to extend the CPU’s address/data bus
outside the device.
(1) Register Configuration
(2) Block Diagram
Address : 0000A7H
CKE
RYE
HDE
ICBS
HMBS
WRE
LMBS
WWWWWW
W
Initial value
0000*00- B
Bus control signal selection register (ECSR)
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
External address output control register (HACR)
Address : 0000A6H
E23
E22
E21
E20
E19
E18
E17
E16
WWWWWW
WW
Initial value
00000000B
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
W
*
Address : 0000A5H
ICR1
ICR0
HMR1 HMR0
LMR1 LMR0
WWW
W
WW
Initial value
0011--00 B
Auto-ready function selection register (ARSR)
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
: Write only
: Unused
: “1” or “0”
P3
P2
P1
P0
Access control
P0
Address control
Data control
P0 data
P0 direction
P3
RB
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