2 segment output select register (segr) – FUJITSU Semiconductor Controller MB89950/950A User Manual
Page 260
246
CHAPTER 12 LCD CONTROLLER/DRIVER
12.3.2
Segment Output Select Register (SEGR)
Segment output select register (SEGR) is used to select N-ch open-drain I/O port
function or segment output function for P00/SEG20 to P07/SEG27, P10/SEG28 to P17/
SEG35 and P20/SEG36 to P25/SEG41, in order to be consistent with mask option.
■ Segment output select register (SEGR)
Figure 12.3-6 Segment output select register (SEGR)
Address
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Initial value
007A
H
SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG00
-0000000
B
R/W
R/W
R/W
R/W
R/W
R/W
R/W
SEG00
Segment output selection bit
Segment output selection bit
Segment output selection bit
Segment output selection bit
Segment output selection bit
Segment output selection bit
Segment output selection bit
0
Select as N-ch open-drain I/O ports (P00 to P07)
Select as N-ch open-drain I/O ports (P10 to P13)
Select as N-ch open-drain I/O ports (P14 to P15)
Select as N-ch open-drain I/O ports (P20 to P23)
Select as N-ch open-drain I/O ports (P24 to P25)
Select as N-ch open-drain I/O port (P16)
Select as N-ch open-drain I/O port (P17)
1
Select as segment output (SEG20 to SEG27)
SEG10
0
1
Select as segment output (SEG28 to SEG31)
SEG11
0
1
Select as segment output (SEG32 to SEG33)
SEG12
0
1
Select as segment output (SEG34)
SEG13
0
1
Select as segment output (SEG35)
SEG14
0
1
Select as segment output (SEG36 to SEG39)
SEG15
0
1
Select as segment output (SEG40 to SEG41)
R/W : Readable and writable
: Unused
: Initial value