參數資料
型號: AT90S2313-10PC
廠商: Atmel
文件頁數: 51/92頁
文件大小: 0K
描述: IC MCU 2K FLSH 10MHZ UART 20DIP
標準包裝: 18
系列: AVR® 90S
核心處理器: AVR
芯體尺寸: 8-位
速度: 10MHz
連通性: SPI,UART/USART
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數: 15
程序存儲器容量: 2KB(1K x 16)
程序存儲器類型: 閃存
EEPROM 大小: 128 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 6 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 20-DIP(0.300",7.62mm)
包裝: 管件
1997 Microchip Technology Inc.
DS30234D-page 55
PIC16C6X
5.3
PORTC and TRISC Register
PORTC is an 8-bit wide bi-directional port. Each pin is
individually congurable as an input or output through
the TRISC register. PORTC is multiplexed with several
peripheral functions (Table 5-5). PORTC pins have
Schmitt Trigger input buffers.
When enabling peripheral functions, care should be
taken in dening TRIS bits for each PORTC pin. Some
peripherals override the TRIS bit to make a pin an out-
put, while other peripherals override the TRIS bit to
make a pin an input. Since the TRIS bit override is in
effect while the peripheral is enabled, read-modify-
write instructions (BSF, BCF, XORWF) with TRISC as
destination should be avoided. The user should refer to
the corresponding peripheral section for the correct
TRIS bit settings.
EXAMPLE 5-3:
INITIALIZING PORTC
BCF
STATUS, RP0
;
BCF
STATUS, RP1
; PIC16C66/67 only
CLRF
PORTC
; Initialize PORTC by
; clearing output
; data latches
BSF
STATUS, RP0
; Select Bank 1
MOVLW
0xCF
; Value used to
; initialize data
; direction
MOVWF
TRISC
; Set RC<3:0> as inputs
; RC<5:4> as outputs
; RC<7:6> as inputs
Applicable Devices
61 62 62A R62 63 R63 64 64A R64 65 65A R65 66 67
FIGURE 5-6:
PORTC BLOCK DIAGRAM
PORT/PERIPHERAL Select(2)
Data bus
WR
PORT
WR
TRIS
RD
Data Latch
TRIS Latch
RD TRIS
Schmitt
Trigger
Q
D
Q
CK
QD
EN
Peripheral Data Out
0
1
Q
D
Q
CK
P
N
VDD
VSS
PORT
Peripheral
OE(3)
Peripheral input
I/O
pin(1)
Note 1:
I/O pins have diode protection to VDD and VSS.
2:
Port/Peripheral select signal selects between port
data and peripheral output.
3:
Peripheral OE (output enable) is only activated if
peripheral select is active.
TABLE 5-5:
PORTC FUNCTIONS FOR PIC16C62/64
Name
Bit# Buffer Type Function
RC0/T1OSI/T1CKI
bit0
ST
Input/output port pin or Timer1 oscillator input or Timer1 clock input
RC1/T1OSO
bit1
ST
Input/output port pin or Timer1 oscillator output
RC2/CCP1
bit2
ST
Input/output port pin or Capture1 input/Compare1 output/PWM1 output
RC3/SCK/SCL
bit3
ST
RC3 can also be the synchronous serial clock for both SPI and I2C modes.
RC4/SDI/SDA
bit4
ST
RC4 can also be the SPI Data In (SPI mode) or data I/O (I2C mode).
RC5/SDO
bit5
ST
Input/output port pin or synchronous serial port data output
RC6
bit6
ST
Input/output port pin
RC7
bit7
ST
Input/output port pin
Legend: ST = Schmitt Trigger input
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