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Bit 4: Expansion Signal Selection (SGX)
Bit 4 (SGX) selects whether the SEG
segment pins (SEG
40
M). In the H8/38347 Group and H8/38447 Group this bit should be left at its initial value and not
written to. Changing the value of this bit may prevent the SEG/COM signal from operating
normally.
Bit 4
SGX
Description
0
SEG
40
1
CL
, CL
1
Note:
* Functions as ports when SGS3 to SGS0 are set at "0000".
Bits 3 to 0: Segment driver select 3 to 0 (SGS3 to SGS0)
Bits 3 to 0 select the segment drivers to be used. The SGX = 0 setting is selected on the H8/38347
and H8/38447.
Bit 4
Bit 3
Bit 2
SGX
SGS3
SGS2
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
1
*
1
0
0
1
0
0
1
0
0
1
0
1
1
1
*
Note:
1. SEG
to SEG
40
/CL
40
1
to SEG
) or as segment external expansion signal pins (CL
37
to SEG
pins*
37
, DO, and M pins
2
Function of Pins SEG
SEG
40
Bit 1
Bit 0
to
SGS1
SGS0
SEG
33
0
0
Port
0
1
SEG
1
*
SEG
0
*
SEG
1
*
SEG
SEG
*
*
Port( *
1
0
0
) Port
0
1
Do not use
1
*
*
*
*
*
are external expansion pins.
37
, SEG
/CL
, SEG
/DO, and SEG
39
2
38
to SEG
40
SEG
SEG
SEG
32
24
to
to
to
SEG
SEG
SEG
25
17
Port
Port
Port
Port
Port
Port
SEG
Port
Port
SEG
SEG
Port
SEG
SEG
SEG
SEG
SEG
SEG
Port
Port
Rev. 6.00 Aug 04, 2006 page 435 of 680
Section 13 LCD Controller/Driver
/M pins are used as
37
, CL
1
(initial value)
1
SEG
16
8
to
SEG
Notes
9
1
Port
(initial value)
Port
Port
Port
Port
SEG
Port
*: Don't care
REJ09B0145-0600
, DO, and
2
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