參數(shù)資料
型號(hào)： KSZ8864RMNI
廠商： Micrel Inc
文件頁數(shù)： 45/111頁
文件大?。?/td> 0K
描述： IC ETHERNET SWITCH 4PORT 64QFN
特色產(chǎn)品： KSZ8864RMN Ethernet Switches
標(biāo)準(zhǔn)包裝： 348
系列： *
其它名稱： 576-3995
1997 Microchip Technology Inc.
DS30444E - page 39
PIC16C9XX
5.6
PORTF and TRISF Register
PORTF is an digital input only port. Each pin is multi-
plexed with an LCD segment driver. These pins have
Schmitt Trigger input buffers.
EXAMPLE 5-6:
INITIALIZING PORTF
BCF STATUS,RP0
;Select Bank2
BSF STATUS,RP1
;
BCF LCDSE,SE16
;Make all PORTF
BCF LCDSE,SE12
;digital inputs
Note 1: On a Power-on Reset these pins are con-
gured as LCD segment drivers.
Note 2: To congure the pins as a digital port, the
corresponding bits in the LCDSE register
must be cleared. Any bit set in the LCDSE
register overrides any bit settings in the
corresponding TRIS register.
FIGURE 5-9:
PORTF BLOCK DIAGRAM
RD PORT
Schmitt
Trigger
input
buffer
EN
Q
D
EN
Digital Input/
LCDSE<n>
LCD
LCD Segment
LCD Output pin
LCD
LCD Common
Data Bus
RD TRIS
VDD
Segment Data
Output Enable
Common Data
Output Enable
TABLE 5-11: PORTF FUNCTIONS
TABLE 5-12: SUMMARY OF REGISTERS ASSOCIATED WITH PORTF
Name
Bit#
Buffer Type
Function
RF0/SEG12
bit0
ST
Digital input or Segment Driver12
RF1/SEG13
bit1
ST
Digital input or Segment Driver13
RF2/SEG14
bit2
ST
Digital input or Segment Driver14
RF3/SEG15
bit3
ST
Digital input or Segment Driver15
RF4/SEG16
bit4
ST
Digital input or Segment Driver16
RF5/SEG17
bit5
ST
Digital input or Segment Driver17
RF6/SEG18
bit6
ST
Digital input or Segment Driver18
RF7/SEG19
bit7
ST
Digital input or Segment Driver19
Legend: ST = Schmitt Trigger input
Address Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-on
Reset
Value on all
other resets
107h
PORTF
RF7
RF6
RF5
RF4
RF3
RF2
RF1
RF0
0000 0000
187h
TRISF
PORTF Data Direction Control Register
1111 1111
10Dh
LCDSE
SE29
SE27
SE20
SE16
SE12
SE9
SE5
SE0
1111 1111
Legend: Shaded cells are not used by PORTF.
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