Техническая Спецификация для Microchip Technology ARD00385
PIC18F87K90 FAMILY
DS39957D-page 278
2009-2011 Microchip Technology Inc.
The LCDSE5:LCDSE0 registers configure the
functions of the port pins. Setting the segment enable
bit for a particular segment configures that pin as an
LCD driver. There are six LCD Segment Enable
registers, as shown in
functions of the port pins. Setting the segment enable
bit for a particular segment configures that pin as an
LCD driver. There are six LCD Segment Enable
registers, as shown in
. The prototype
LCDSEx register is shown in
.
TABLE 20-1:
LCDSE REGISTERS AND
ASSOCIATED SEGMENTS
ASSOCIATED SEGMENTS
Once the module is initialized for the LCD panel, the
individual bits of the LCDDATA23:LCDDATA0 registers
are cleared or set to represent a clear or dark pixel,
respectively.
Specific sets of LCDDATA registers are used with
specific segments and common signals. Each bit
represents a unique combination of a specific segment
connected to a specific common.
Individual LCDDATA bits are named by the convention,
“SxxCy”, with “xx” as the segment number and “y” as
the common number. The relationship is summarized
in
individual bits of the LCDDATA23:LCDDATA0 registers
are cleared or set to represent a clear or dark pixel,
respectively.
Specific sets of LCDDATA registers are used with
specific segments and common signals. Each bit
represents a unique combination of a specific segment
connected to a specific common.
Individual LCDDATA bits are named by the convention,
“SxxCy”, with “xx” as the segment number and “y” as
the common number. The relationship is summarized
in
. The prototype LCDDATAx register is
shown in
Register
Segments
LCDSE0
7:0 (RD<7:0>)
LCDSE1
15:8 (RA<5:4>, RC2, RC5,
RB<4:1>)
LCDSE2
23:16 (RF<5:1>, RA1,
RC<4:3>)
LCDSE3
31:24 (RE7, RB0, RB5,
RC<7:6>, RG4, RF<7:6>)
LCDSE4
39:32 (RJ<4:7>, RJ<3:1>, RC1)
LCDSE5
47:40 (RH<0:3>, RH<7:4>)
Note:
The LCDSE5:LCDSE4 registers are not
implemented in PIC18F6XK90 devices.
implemented in PIC18F6XK90 devices.
Note:
In PIC18F6XK90 devices, writing into the
registers, LCDDATA4, LCDDATA5,
LCDDATA10, LCDDATA11, LCDDATA16,
LCDDATA17, LCDDATA22 and
LCDDATA23, will not affect the status of
any pixel. These registers can be used as
general purpose registers.
registers, LCDDATA4, LCDDATA5,
LCDDATA10, LCDDATA11, LCDDATA16,
LCDDATA17, LCDDATA22 and
LCDDATA23, will not affect the status of
any pixel. These registers can be used as
general purpose registers.
REGISTER 20-5:
LCDSEx: LCD SEGMENTx ENABLE REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
SE(n + 7)
SE(n + 6)
SE(n + 5)
SE(n + 4)
SE(n + 3)
SE(n + 2)
SE(n + 1)
SE(n)
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-0
SE(n + 7):SE(n):
Segment Enable bits
For LCDSE0: n = 0
For LCDSE1: n = 8
For LCDSE2: n = 16
For LCDSE3: n = 24
For LCDSE4: n = 32
For LCDSE5: n = 40
For LCDSE1: n = 8
For LCDSE2: n = 16
For LCDSE3: n = 24
For LCDSE4: n = 32
For LCDSE5: n = 40
1
= Segment function of the pin is enabled, digital I/O is disabled
0
= I/O function of the pin is enabled