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2. CPU Core
2.3 System clock controller
TMP89FM42
RA001
2. Prescaler and divider
These circuits divide fcgck. The divided clocks are supplied to the timer counter, the time
base timer and other peripheral circuits.
When both SYSCR1<DV9CK> and SYSCR2<SYSCK> are "0", the input clock to stage 9
of the divider becomes the output of stage 8 of the divider.
When SYSCR1<DV9CK> or SYSCR2<SYSCK> is "1", the input clock to stage 9 of the
divider becomes fs/4. When SYSCR2<SYSCK> is "1", the outputs of stages 1 to 8 of the
divider and prescaler are stopped.
The prescaler and divider are cleared to "0" at a reset and at the end of the warm-up opera-
tion that follows the release of STOP mode.
3. Machine cycle
Instruction execution is synchronized with the main system clock (fm).
The minimum instruction execution unit is called a "machine cycle". One machine cycle
corresponds to one main system clock.
There are a total of 11 different types of instructions for the TLCS-870/C1 Series: 10 types
ranging from 1-cycle instructions, which require one machine cycle for execution, to 10-
cycle instructions, which require 10 machine cycles for execution, and 13-cycle instructions,
which require 13 machine cycles for execution.
2.3.4
Warm-up counter
The warm-up counter is a circuit that counts the high-frequency clock (fc) and the low-frequency clock (fs),
and it consists of a source clock selection circuit, a 3-stage frequency division circuit and a 14-stage counter.
The warm-up counter is used to secure the time after a power-on reset is released before the supply voltage
becomes stable and secure the time after the STOP mode is released or the operation mode is changed before
the oscillation by the oscillation circuit becomes stable.
Figure 2-6 Warm-up Counter Circuit
S
Z
D
C
B
A
S
Z
A
B
Clock for high-frequency clock
oscillation circuit (fc)
Clock for low-frequency clock
oscillation circuit (fs)
Com-
parator
WUCDR
SYSCR2
SYSCR1
WUCCR
Enable/disable counting up
XEN XTEN
STOP
INTWUC interrupt
Enable CPU operation
WUCSEL
WUCDIV
WUCRST
Warm-up counter
controller
1 2 3 4 5 6 7 8 9 10
11
12
13
14
0 1 2 3 4 5 6 7
1 2 3
Содержание TLCS-870/C1 Series
Страница 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Страница 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Страница 4: ......
Страница 14: ......
Страница 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Страница 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Страница 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Страница 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Страница 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Страница 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Страница 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Страница 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Страница 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Страница 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Страница 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Страница 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Страница 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Страница 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Страница 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Страница 336: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 Note 1 Make sure that you set the C register to 0x00 LD FLSCR2 0xD5 ...
Страница 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Страница 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Страница 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Страница 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Страница 406: ...26 Package Dimensions TMP89FM42 ...
Страница 408: ......