M37224M3 Datasheet, PDF (21/84 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M37224M3-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
1/4096
XIN
1/2
TIM2
HSYNC
TIM3
Selection gate :
Connected to black
side at reset
T12M : Timer 12 mode register
T34M : Timer 34 mode register
Data bus
8
Timer 1 latch (8)
8
1/8
T12M0
T12M2
T12M4
Timer 1 (8)
8
8
T12M1
T12M3
T34M5
T34M0
T34M2
T34M1
T34M4
T34M3
Timer 2 latch (8)
8
Timer 2 (8)
8
8
FF16
Timer 3 latch (8)
8
Timer 3 (8)
8
8
0716
Timer 4 latch (8)
8
Timer 4 (8)
8
Timer 1
interrupt request
Timer 2
interrupt request
Reset
STP
instruction
Timer 3
interrupt request
Timer 4
interrupt request
Notes 1 : HIGH pulse width of external clock inputs TIM2 and TIM3 needs 4 machine cycles or more.
2 : When the external clock source is selected, timers 2 and 3 are counted at a rising edge
of input signal.
3 : In the stop mode or the wait mode, external clock inputs TIM2 and TIM3 cannot be used.
Fig. 17. Timer Block Diagram
20