参数资料
型号: KSZ8864RMN-EVAL
厂商: Micrel Inc
文件页数: 44/111页
文件大小: 0K
描述: BOARD EVALUATION FOR KSZ8864RMN
标准包装: 1
主要目的: 接口,以太网控制器(PHY 和 MAC)
嵌入式:
已用 IC / 零件: KSZ8864RMN
已供物品:
相关产品: 576-3787-ND - IC ETHERNET SW 4PORT 64QFN
其它名称: 576-3869
PIC16C9XX
DS30444E - page 38
1997 Microchip Technology Inc.
5.5
PORTE and TRISE Register
PORTE is an digital input only port. Each pin is multi-
plexed with an LCD segment driver. These pins have
Schmitt Trigger input buffers.
EXAMPLE 5-5:
INITIALIZING PORTE
BCF STATUS,RP0
;Select Bank2
BSF STATUS,RP1
;
BCF LCDSE,SE27
;Make all PORTE
BCF LCDSE,SE5
;and PORTG<7>
BCF LCDSE,SE9
;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 5-8:
PORTE 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 5-9: PORTE FUNCTIONS
TABLE 5-10: SUMMARY OF REGISTERS ASSOCIATED WITH PORTE
Name
Bit#
Buffer Type
Function
RE0/SEG05
bit0
ST
Digital input or Segment Driver05
RE1/SEG06
bit1
ST
Digital input or Segment Driver06
RE2/SEG07
bit2
ST
Digital input or Segment Driver07
RE3/SEG08
bit3
ST
Digital input or Segment Driver08
RE4/SEG09
bit4
ST
Digital input or Segment Driver09
RE5/SEG10
bit5
ST
Digital input or Segment Driver10
RE6/SEG11
bit6
ST
Digital input or Segment Driver11
RE7/SEG27
bit7
ST
Digital input or Segment Driver27 (not available on 64-pin devices)
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
09h
PORTE
RE7
RE6
RE5
RE4
RE3
RE2
RE1
RE0
0000 0000
89h
TRISE
PORTE 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 PORTE.
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