ST72321B Datasheet, PDF (70/187 Pages) STMicroelectronics – 64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface

16-BIT TIMER (Cont’d)
Figure 43. Timer Block Diagram
f_CPU
ST7 INTERNAL BUS
MCU-PERIPHERAL INTERFACE
EXTCLK
pin
8 high
EXEDG
8 low
8-bit
buffer
16
1/2
1/4
1/8
CC[1:0]
COUNTER
REGISTER
ALTERNATE
COUNTER
REGISTER
16
88
88
OUTPUT
COMPARE
REGISTER
1
OUTPUT
COMPARE
REGISTER
2
TIMER INTERNAL BUS
16 16
88
88
INPUT
CAPTURE
REGISTER
1
INPUT
CAPTURE
REGISTER
2
16
16
OVERFLOW
DETECT
CIRCUIT
OUTPUT COMPARE
CIRCUIT
6
EDGE DETECT
CIRCUIT1
EDGE DETECT
CIRCUIT2
ICAP1
pin
ICAP2
pin
ICF1 OCF1 TOF ICF2 OCF2 TIMD 0 0
(Control/Status Register)
CSR
LATCH1
LATCH2
OCMP1
pin
OCMP2
pin
ICIE OCIE TOIE FOLV2 FOLV1OLVL2 IEDG1 OLVL1
(Control Register 1) CR1
OC1E OC2E OPM PWM CC1 CC0 IEDG2 EXEDG
(Control Register 2) CR2
(See note)
TIMER INTERRUPT
Note: If IC, OC and TO interrupt requests have separate vectors
then the last OR is not present (See device Interrupt Vector Table)
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