User`s manual

109
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
M37281MAH–XXXSP,M37281MFH–XXXSP
M37281MKH–XXXSP,M37281EKSP
Fig. 8.11.46 Top Border Control Register 1
Fig. 8.11.47 Top Border Control Register 2
b7 b6 b5b4 b3 b2b1 b0
Top border control register 1 (TB1) [Address 021C
16]
B
Name Functions
After reset
RW
Top Border Control Register 1
0
to
7
Control bits of
top border
(TB10 to TB17)
Top border position (low-order 8 bits)
T
H ✕
(setting value of low-order 2 bits of TB2 ✕ 16
2
+ setting value of high-order 4 bits of TB1 ✕16
1
+ setting value of low-order 4 bits of TB1 ✕16
0
)
Indeterminate
RW
Notes 1: Do not set “00
16” or “0116” to the TB1 at TB2 = “00 16.”
2: T
H is cycle of HSYNC.
3: TB2 is top border control register 2.
b7 b6 b5b4 b3 b2b1 b0
Top border control register 2 (TB2) [Address 021E
16 ]
B Name Functions After reset R
W
Top Border Control Register 2
0,
1
Control bits of
top border
(TB20 ,TB21)
Top border position (high-order 2 bits)
T
H ✕
(setting value of low-order 2 bits of TB2 ✕16
2
+ setting value of high-order 4 bits of TB1 ✕16
1
+ setting value of low-order 4 bits of TB1 ✕16
0
)
Indeterminate RW
Notes 1: Do not set “00
16 ” or “01 16 ” to the TB1 at TB2 = “00 16 .”
2: T
H is cycle of H SYNC .
3: TB1 is top border control register 1.
Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are indeterminate.
2
to
7
Indetermin
ate
R —