參數(shù)資料
型號: 25C256
廠商: Microchip Technology Inc.
英文描述: 256K 5.0V SPI Bus Serial EEPROM(4.5~5.5V,256K位,SPI總線串行EEPROM)
中文描述: 256K 5.0V SPI總線串行EEPROM(4.5?5.5V的,256K位和SPI總線串行EEPROM的)
文件頁數(shù): 43/170頁
文件大?。?/td> 4191K
代理商: 25C256
2003 Microchip Technology Inc.
Preliminary
DS40300C-page 41
PIC16F62X
TABLE 5-3:
PORTB FUNCTIONS
TABLE 5-4:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTB
(1)
Name
Function
Input Type
Output
Type
Description
RB0/INT
RB0
TTL
CMOS
Bi-directional I/O port. Can be software programmed for
internal weak pull-up.
INT
ST
External interrupt.
RB1/RX/DT
RB1
TTL
CMOS
Bi-directional I/O port. Can be software programmed for
internal weak pull-up.
RX
ST
USART Receive Pin
DT
ST
CMOS
Synchronous data I/O
RB2/TX/CK
RB2
TTL
CMOS
Bi-directional I/O port
TX
CMOS
USART Transmit Pin
CK
ST
CMOS
Synchronous Clock I/O. Can be software programmed
for internal weak pull-up.
RB3/CCP1
RB3
TTL
CMOS
Bi-directional I/O port. Can be software programmed for
internal weak pull-up.
CCP1
ST
CMOS
Capture/Compare/PWM/I/O
RB4/PGM
RB4
TTL
CMOS
Bi-directional I/O port. Can be software programmed for
internal weak pull-up.
PGM
ST
Low voltage programming input pin. Interrupt-on-pin
change. When low voltage programming is enabled, the
interrupt-on-pin change and weak pull-up resistor are
disabled.
RB5
RB5
TTL
CMOS
Bi-directional I/O port. Interrupt-on-pin change. Can be
software programmed for internal weak pull-up.
RB6/T1OSO/T1CKI/
PGC
RB6
TTL
CMOS
Bi-directional I/O port. Interrupt-on-pin change. Can be
software programmed for internal weak pull-up.
T1OSO
XTAL
Timer1 Oscillator Output
T1CKI
ST
Timer1 Clock Input
PGC
ST
ICSP Programming Clock
RB7/T1OSI/PGD
RB7
TTL
CMOS
Bi-directional I/O port. Interrupt-on-pin change. Can be
software programmed for internal weak pull-up.
T1OSI
XTAL
Timer1 Oscillator Input
PGD
ST
CMOS
ICSP Data I/O
Legend: O = Output
— = Not used
TTL = TTL Input
CMOS = CMOS Output
I
= Input
OD
= Open Drain Output
P
ST = Schmitt Trigger Input
AN = Analog
= Power
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR
Value on
All Other
RESETS
06h, 106h PORTB
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
xxxx xxxx
uuuu uuuu
86h, 186h
TRISB
TRISB7
TRISB6
TRISB5
TRISB4
TRISB3
TRISB2
TRISB1
TRISB0
1111 1111
1111 1111
81h, 181h
OPTION
RBPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
1111 1111
1111 1111
Legend: u = unchanged, x = unknown
Note
1:
Shaded bits are not used by PORTB.
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