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TMP89FM42
RA001
2.3
System clock controller
2.3.1
Configuration
The system clock controller consists of a clock generator, a clock gear, a timing generator, a warm-up
counter and an operation mode control circuit.
Figure 2-3 System Clock Controller
2.3.2
Control
The system clock controller is controlled by system control register 1 (SYSCR1), system control register 2
(SYSCR2), the warm-up counter control register (WUCCR), the warm-up counter data register (WUCDR) and
the clock gear control register (CGCR).
Note 1: fcgck: Gear clock [Hz], fs: Low-frequency clock [Hz]
Note 2: Bits 2, 1 and 0 of SYSCR1 are read as "0". Bit 3 is read as "1".
System control register 1
SYSCR1
(0x0FDC)
7
6
5
4
3
2
1
0
Bit Symbol
STOP
RELM
OUTEN
DV9CK
-
-
-
-
Read/Write
R/W
R/W
R/W
R/W
R
R
R
R
After reset
0
0
0
0
1
0
0
0
STOP
Activates the STOP mode
0 :
1 :
Operate the CPU and the peripheral circuits
Stop the CPU and the peripheral circuits (activate the STOP mode)
RELM
Selects the STOP mode release
method
0 :
1 :
Edge-sensitive release mode (Release the STOP mode at the rising edge
of the STOP mode release signal)
Level-sensitive release mode (Release the STOP mode at the "H" level of
the STOP mode release signal)
OUTEN
Selects the port output state in the
STOP mode
0 :
1 :
High impedance
Output hold
DV9CK
Selects the input clock to stage 9 of
the divider
0 :
1 :
fcgck/2
9
fs/4
Operation mode
control circuit
XTIN
XTOUT
Clock generator
fs
fc
System clock
INTWUC interrupt
System control register
Oscillation/stop control
Low-frequency clock
oscillation circuit
High-frequency
clock oscillation
circuit
XIN
XOUT
Timing
generator
fcgck
1/4
SYSCR1
SYSCR2
TBTCR
WUCCR
WUCDR
Clock gear control register
FCGCKSEL
STOP
DV9CK
XEN/XTEN
Warm-up counter
Clock gear
(x1/4,x1/2,x1)
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: ......