参数资料
型号: MCV18E-I/P
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PDIP18
封装: 0.300 INCH, LEAD FREE, PLASTIC, DIP-18
文件页数: 24/108页
文件大小: 1509K
代理商: MCV18E-I/P
MCV18E
DS41399A-page 22
2009 Microchip Technology Inc.
FIGURE 3-2:
BLOCK DIAGRAM OF
RA4/T0CKI PIN
TABLE 3-1:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
DATA
BUS
WR
PORT
WR
TRIS
RD PORT
Data Latch
TRIS Latch
RD TRIS
Schmitt
Trigger
Input
Buffer
N
VSS
RA4/T0CKI
Timer0 Clock Input
Q
D
Q
CK
EN
QD
EN
VSS
Q
D
Q
CK
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on
all other
Resets
PORTA
RA4
RA3
RA2
RA1
RA0
---x 0000 ---u uuuu
TRISA
TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 ---1 1111 ---1 1111
ADCON1
PCFG2
PCFG1
PCFG0 ---- -000 ---- -000
Legend: x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by
PORTA.
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