327
Bit 4: Expansion signal select (SGX)
Bit 4 selects whether the SEG
32
/CL
1
, SEG
31
/CL
2
, SEG
30
/DO, and SEG
29
/M pins are used as
segment pins (SEG
32
to SEG
29
) or as segment external expansion pins (CL
1
, CL
2
, DO, M).
Bit 4
SGX
Description
0
Pins SEG
32
to SEG
29
*
(Initial value)
1
Pins CL
1
, CL
2
, DO, M
Note:
*
These pins function as ports when the setting of SGS3 to SGS0 is 0000 or 0001.
Bit 3: Segment driver select 3 to 0 (SGS3 to SGS0)
Bits 3 to 0 select the segment drivers to be used.
Function of Pins SEG
32
to SEG
1
Bit 4
SGX
Bit 3
SGS3
Bit 2
SGS2
Bit 1
SGS1
Bit 0
SGS0
SEG
32
to
SEG
25
SEG
24
to
SEG
17
SEG
16
to
SEG
9
SEG
8
to
SEG
1
Notes
0
0
0
0
0
Port
Port
Port
Port
(Initial value)
0
0
0
1
Port
Port
Port
Port
0
0
1
*
SEG
Port
Port
Port
0
1
0
*
SEG
SEG
Port
Port
0
1
1
*
SEG
SEG
SEG
Port
1
*
*
*
SEG
SEG
SEG
SEG
1
0
0
0
0
Port
*
Port
Port
Port
*
*
*
*
Setting prohibited
*
: Don’t care
Note:
*
SEG
32
to SEG
29
are external expansion pins.