参数资料
型号: PIC18LF252T-I/SO
厂商: Microchip Technology
文件页数: 3/134页
文件大小: 0K
描述: IC MCU FLASH 16KX16 A/D 28SOIC
产品培训模块: Asynchronous Stimulus
标准包装: 1,600
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 40MHz
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: 23
程序存储器容量: 32KB(16K x 16)
程序存储器类型: 闪存
EEPROM 大小: 256 x 8
RAM 容量: 1.5K x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
数据转换器: A/D 5x10b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
包装: 带卷 (TR)
PIC16C9XX
DS30444E - page 100
1997 Microchip Technology Inc.
13.4.1
SEGMENT ENABLES
The LCDSE register is used to select the pin function
for groups of pins. The selection allows each group of
pins to operate as either LCD drivers or digital only
pins. To congure the pins as a digital port, the corre-
sponding bits in the LCDSE register must be cleared.
If the pin is a digital I/O the corresponding TRIS bit con-
trols the data direction. Any bit set in the LCDSE regis-
ter overrides any bit settings in the corresponding TRIS
register.
Note 1: On a Power-on Reset these pins are con-
gured as LCD drivers.
Note 2: The LMUX1:LMUX0 takes precedence
over the LCDSE bit settings for pins RD7,
RD6 and RD5.
EXAMPLE 13-1: STATIC MUX WITH 32
SEGMENTS
BCF
STATUS,RP0
;Select Bank 2
BSF
STATUS,RP1
;
BCF
LCDCON,LMUX1 ;Select Static MUX
BCF
LCDCON,LMUX0 ;
MOVLW 0xFF
;Make PortD,E,F,G
MOVWF LCDSE
;LCD pins
. . .
;configure rest of LCD
EXAMPLE 13-2: 1/3 MUX WITH 13
SEGMENTS
BCF
STATUS,RP0
;Select Bank 2
BSF
STATUS,RP1
;
BSF
LCDCON,LMUX1 ;Select 1/3 MUX
BCF
LCDCON,LMUX0 ;
MOVLW 0x87
;Make PORTD<7:0> &
MOVWF LCDSE
;PORTE<6:0> LCD pins
. . .
;configure rest of LCD
FIGURE 13-12:LCDSE REGISTER (ADDRESS 10Dh)
R/W-1
SE29
SE27
SE20
SE16
SE12
SE9
SE5
SE0
R =Readable bit
W =Writable bit
U =Unimplemented bit,
Read as ‘0’
-n =Value at POR reset
bit7
bit0
bit 7:
SE29: Pin function select
RD7/COM1/SEG31 - RD5/COM3/SEG29
1 = pins have LCD drive function
0 = pins have digital Input function
The LMUX1:LMUX0 setting takes precedence over the LCDSE register.
bit 6:
SE27: Pin function select
RG7/SEG28 and RE7/SEG27
1 = pins have LCD drive function
0 = pins have digital Input function
bit 5:
SE20: Pin function select
RG6/SEG26 - RG0/SEG20
1 = pins have LCD drive function
0 = pins have digital Input function
bit 4:
SE16: Pin function select
RF7/SEG19 - RF4/SEG16
1 = pins have LCD drive function
0 = pins have digital Input function
bit 3:
SE12: Pin function select
RF3/SEG15 - RF0/SEG12
1 = pins have LCD drive function
0 = pins have digital Input function
bit 2:
SE9: Pin function select
RE6/SEG11 - RE4/SEG09
1 = pins have LCD drive function
0 = pins have digital Input function
bit 1:
SE5: Pin function select
RE3/SEG08 - RE0/SEG05
1 = pins have LCD drive function
0 = pins have digital Input function
bit 0:
SE0: Pin function select
RD4/SEG04 - RD0/SEG00
1 = pins have LCD drive function
0 = pins have digital I/O function
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