HD6473887 Datasheet, PDF (364/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

Bit 4: Expansion Signal Selection (SGX)
Bit 4 (SGX) selects whether the SEG₄₀/CL₁, SEG₃₉/CL₂, SEG₃₈/DO and SEG₃₇/M pins are used as
segment pins (SEG₄₀ to SEG₃₇) or as segment external expansion signal pins (CL₁, CL₂, DO and
M).
Bit 4
SGX
Description
0
SEG₄₀ to SEG₃₇ pins*
1
CL₁, CL₂, DO and M pins
Note: * Functions as ports when SGS3 to SGS0 are set at “0000”.
(Initial value)
Bits 3 to 0: Segment driver select 3 to 0 (SGS3 to SGS0)
Bits 3 to 0 select the segment drivers to be used.
Bit 4
SGX
0
Function of Pins SEG₄₀ to SEG₁
SEG₄₀
Bit 3 Bit 2 Bit 1 Bit 0 to
SGS3 SGS2 SGS1 SGS0 SEG₃₃
SEG₃₂
to
SEG₂₅
SEG₂₄
to
SEG₁₇
SEG₁₆
to
SEG₉
SEG₈
to
SEG₁
0
0
0
0
Port Port Port Port Port
0
0
001
SEG Port Port Port Port
0
0
01*
SEG SEG Port Port Port
0
0
10*
SEG SEG SEG Port Port
0
0
11*
SEG SEG SEG SEG Port
0
1
***
SEG SEG SEG SEG SEG
1
0
000
Port(*¹) Port Port Port Port
1
0
001
Do not use
1
0
01*
1
0
1
*
*
1
1
***
Note: 1. SEG₄₀ to SEG₃₇ are external expansion pins.
Notes
(Initial value)
*: Don’t care
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