7220 Datasheet, PDF (59/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

FUNCTIONAL DESCRIPTION
2.5 Interrupts
Interrupt Input Polarity Register
b7 b6 b5 b4 b3 b2 b1 b0
0
00
Interrupt input polarity register(RE) [Address 00F9 16]
b
Name
Functions
0 Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
1, 2 Fix these bits to “0.”
3 INT1 polarity switch bit
(RE3)
0 : Positive polarity
1 : Negative polarity
4 INT2 polarity switch bit
(RE4)
0 : Positive polarity
1 : Negative polarity
5 INT3 polarity switch bit
(RE5)
0 : Positive polarity
1 : Negative polarity
6 Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
7 Fix this bit to “0.”
After reset R W
Indeterminate R —
0
RW
0
RW
0
RW
0
RW
0
R—
0
RW
Fig. 2.5.7 Interrupt input polatiry register (address 00F916)
CRT port control register
b7 b6 b5 b4 b3 b2 b1 b0
CRT port control register(CRTP) [Address 00EC 16]
b
Name
0 HSYNC input polarity
switch bit (HSYC)
1 VSYNC input polarity
switch bit (VSYC)
2 R, G, B output polarity
switch bit (R, G, B)
3 OUT2 output polarity
switch bit (OUT2)
4 OUT1 output polarity
switch bit (OUT1)
5 R signal output switch bit
(OP5)
6 G signal output switch bit
(OP6)
7 B signal output switch bit
(OP7)
Functions
0 : Positive polarity
1 : Negative polarity
0 : Positive polarity
1 : Negative polarity
0 : Positive polarity
1 : Negative polarity
0 : Positive polarity
1 : Negative polarity
0 : Positive polarity
1 : Negative polarity
0 : R signal output
1 : MUTE signal output
0 : G signal output
1 : MUTE signal output
0 : B signal output
1 : MUTE signal output
After reset R W
0
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
RW
Fig. 2.5.8 CRT port control register (address 00EC16)
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7220 Group User’s Manual