7220 Datasheet, PDF (261/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPENDIX
6.7 Control registers
CRT Control Register
b7 b6 b5 b4 b3 b2 b1 b0
CRT control register (CC) [Address 00EA16]
B
Name
Functions
After reset R W
0 All-blocks display control
bit (Note 1) (CC0)
0 : All-blocks display off
1 : All-blocks display on
0 RW
1 Block 1 display control bit 0 : Block 1 display off
(CC1)
1 : Block 1 display on
0 RW
2 Block 2 display control bit 0 : Block 2 display off
(CC2)
1 : Block 2 display on
3 _{Nothing is assigned. These bits are write disable bits.}
to _{When these bits are read out, the values are “0.”}
6
7 P10/OUT2 pin switch bit
(CC7)
0 : P10
1 : OUT2
0 RW
0 R—
0 RW
Notes 1: Display is controlled by logical product (AND) between the all-blocks display
control bit and each block control bit.
(See note 2)
2 : M37220M3-XXXSP/FP
7 Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
0
R—
Fig. 6.7.19 CRT control register
Address 00EA16
6-42
7220 Group User’s Manual