参数资料
型号: PIC18LF6720-I/PT
厂商: Microchip Technology
文件页数: 15/165页
文件大小: 0K
描述: IC MCU FLASH 64KX16 LV 64-TQFP
产品培训模块: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
标准包装: 160
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 25MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,LVD,POR,PWM,WDT
输入/输出数: 52
程序存储器容量: 128KB(64K x 16)
程序存储器类型: 闪存
EEPROM 大小: 1K x 8
RAM 容量: 3.75K x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
数据转换器: A/D 12x10b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 64-TQFP
包装: 托盘
2004 Microchip Technology Inc.
DS39609B-page 109
PIC18F6520/8520/6620/8620/6720/8720
10.3
PORTC, TRISC and LATC
Registers
PORTC is an 8-bit wide, bidirectional port. The corre-
sponding data direction register is TRISC. Setting a
TRISC bit (= 1) will make the corresponding PORTC
pin an input (i.e., put the corresponding output driver in
a high-impedance mode). Clearing a TRISC bit (= 0)
will make the corresponding PORTC pin an output (i.e.,
put the contents of the output latch on the selected pin).
The Data Latch register (LATC) is also memory
mapped. Read-modify-write operations on the LATC
register, read and write the latched output value for
PORTC.
PORTC is multiplexed with several peripheral functions
(Table 10-5). PORTC pins have Schmitt Trigger input
buffers.
When enabling peripheral functions, care should be
taken in defining TRIS bits for each PORTC pin. Some
peripherals override the TRIS bit to make a pin an
output, while other peripherals override the TRIS bit to
make a pin an input. The user should refer to the
corresponding peripheral section for the correct TRIS
bit settings.
The pin override value is not loaded into the TRIS
register. This allows read-modify-write of the TRIS
register, without concern due to peripheral overrides.
RC1 is normally configured by configuration bit,
CCP2MX, as the default peripheral pin of the CCP2
module (default/erased state, CCP2MX = 1).
EXAMPLE 10-3:
INITIALIZING PORTC
FIGURE 10-8:
PORTC BLOCK DIAGRAM (PERIPHERAL OUTPUT OVERRIDE)
Note:
On a Power-on Reset, these pins are
configured as digital inputs.
CLRF
PORTC
; Initialize PORTC by
; clearing output
; data latches
CLRF
LATC
; Alternate method
; to clear output
; data latches
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
PORTC/Peripheral Out Select
Data Bus
WR LATC
WR TRISC
Data
Latch
TRIS Latch
RD TRISC
Q
D
Q
CK
QD
EN
Peripheral Data Out
0
1
Q
D
Q
CK
P
N
VDD
VSS
RD PORTC
Peripheral Data In
I/O pin(1)
or
WR PORTC
RD LATC
Schmitt
Trigger
Note 1:
I/O pins have diode protection to VDD and VSS.
2:
Peripheral Output Enable is only active if Peripheral Select is active.
TRIS
Override
Peripheral Output
Logic
TRIS OVERRIDE
Pin
Override
Peripheral
RC0
Yes
Timer1 Osc for
Timer1/Timer3
RC1
Yes
Timer1 Osc for
Timer1/Timer3,
CCP2 I/O
RC2
Yes
CCP1 I/O
RC3
Yes
SPI/I2C
Master Clock
RC4
Yes
I2C Data Out
RC5
Yes
SPI Data Out
RC6
Yes
USART1 Async
Xmit, Sync Clock
RC7
Yes
USART1 Sync
Data Out
Enable(2)
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