tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 35
tmp89fm42a
Manufacturer Part Number
tmp89fm42a
Description
8 Bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP89FM42A.pdf
(431 pages)
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Part Number:
tmp89fm42aUG
Manufacturer:
TOSHIBA/东芝
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2.3
System clock controller
RA000
2.3
2.3.1
2.3.2
System clock controller
XTOUT
and an operation mode control circuit.
(SYSCR2), the warm-up counter control register (WUCCR), the warm-up counter data register (WUCDR) and
the clock gear control register (CGCR).
XOUT
XTIN
Configuration
Control
The system clock controller consists of a clock generator, a clock gear, a timing generator, a warm-up counter
The system clock controller is controlled by system control register 1 (SYSCR1), system control register 2
XIN
clock oscillation
clock oscillation
clock oscillation
Clock generator
high-frequency
high-frequency
low-frequency
External
External
Internal
circuit
circuit
circuit
Figure 2-3 System Clock Controller
fosc
Oscillation/stop control
fc
fs
OSCSEL
0
1 Y
S
fh
(×1/4, ×1/2, ×1)
Page 16
Clock gear
CGCR
1/4
FCGCKSEL
fs/4
fcgck
WUCCR
TBTCR
System clock
Warm-up
generator
counter
Timing
Internal bus
Internal bus
WUCDR
DV9CK
SYSCR1
INTWUC interrupt request
Operation mode
control circuit
TMP89FM42A
SYSCR2
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