M37221M4H_15 Datasheet, PDF (108/114 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

M37221M4H/M6H/M8H/MAH–XXXSP/FP M37221EASP/FP
Address 00F516
Timer 34 Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
Timer 34 mode register (T34M) [Address 00F516]
B
Name
0 Timer 3 count source
selection bit (T34M0)
Functions
0 : f(XIN)/16
1 : External clock source
1 Timer 4 internal
0 : Timer 3 overflow signal
interrupt count source 1 : f(XIN)/16
selection bit (T34M1)
2 Timer 3 count stop bit 0: Count start
(T34M2)
1: Count stop
3 Timer 4 count stop bit 0: Count start
(T34M3)
1: Count stop
4 ^{Timer 4 count source} 0: Internal clock source
selection bit (T34M4) _{1: f(XIN)/2}
5 Timer 3 external count 0: TIM3 pin input
source selection bit 1: HSYNC pin input
(T34M5)
6, 7 Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
After reset R W
0 RW
0 RW
0 RW
0 RW
0 RW
0 RW
0 R—
Addresses 00F916
Interrupt Input Polarity Register
b7 b6 b5 b4 b3 b2 b1 b0
0
00
Interrupt input polarity register(RE) [Address 00F916]
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.”
After reset R W
0
R—
0
RW
3 INT1 polarity switch bit 0 : Positive polarity
(RE3)
1 : Negative polarity
4 INT2 polarity switch bit 0 : Positive polarity
(RE4)
1 : Negative polarity
5 INT3 polarity switch bit 0 : Positive polarity
(RE5)
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.”
0
RW
0
RW
0
RW
0
R—
0
RW
Rev.1.00 Oct 01, 2002 page 106 of 110
REJ03B0134-0100Z