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2. CPU Core
2.3 System clock controller
TMP89FM42
RA001
2. Release by key-on wakeup
3. Release by the voltage detection circuits
Note: During the STOP period (from the start of the STOP mode to the end of the warm-up), due to
changes in the external interrupt pin signal, interrupt latches may be set to "1" and interrupts may
be accepted immediately after the STOP mode is released. Before starting the STOP mode,
therefore, disable interrupts. Also, before enabling interrupts after STOP mode is released, clear
unnecessary interrupt latches.
1. Release by the
STOP
pin
Release the
STOP
mode by using the STOP pin.
To release the STOP mode by using the STOP pin, set VDCR2<VDSS> to "00" or "10".
(For details of VDCR2, refer to the section of voltage detection circuits.)
The STOP mode release by the STOP pin includes the level-sensitive release mode and the
edge-sensitive release mode, either of which can be selected at SYSCR1<RELM>.
The
STOP
pin is also used as the P11 port and the
INT5
(external interrupt input 5) pin.
Note: When the STOP mode is released, the warm-up counter source clock automatically changes to the clock that generated the
main system clock when the STOP mode was started, regardless of WUCCR<WUCSEL>.
- Level-sensitive release mode
The STOP mode is released by setting the
STOP
pin high.
Setting SYSCR1<RELM> to "1" selects the level-sensitive release mode.
This mode is used for the capacitor backup when the main power supply is cut off and
the long term battery backup.
Even if an instruction for starting the STOP mode is executed while the
STOP
pin in-
put is high, the STOP mode does not start. Thus, to start the STOP mode in the level-
sensitive release mode, it is necessary for the program to first confirm that the
STOP
pin
input is low.
This can be confirmed by testing the port by the software or using interrupts
Note:
When the STOP mode is released, the warm-up counter source clock automatically changes
to the clock that generated the main system clock when the STOP mode was started, regard-
less of WUCCR<WUCSEL>.
Example: Starting the STOP mode from the SLOW mode with an INT5 interrupt
(Warm-up time at release of the STOP mode is about 450ms at fs=32.768 KHz.)
PINT5:
TEST
(P0PRD).5
; To reject noise, the STOP mode does not start
JRS
F, SINT5
; if the
STOP
pin input is high.
LD
(SYSCR1), 0x40
; Sets up the level-sensitive release mode
LD
(WUCCR), 0x03
; WUCCR<WUCDIV> = 00 (No division) (Note)
LD
(WUCDR),0xE8
;
;
Sets the warm-up time
450 ms/1.953 ms = 230.4
→
round up to 0xE8
DI
; IMF = 0
SET
(SYSCR1).7
; Starts the STOP mode
SINT5:
RETI
STOP pin
XOUT pin
NORMAL mode
The STOP mode is released by the hardware.
NORMAL mode
VIH
Warm-up
STOP
mode
Confirm by program that
the STOP pin input is low
and start the STOP mode.
Always released if the
STOP pin input is high.
Summary of Contents for TLCS-870/C1 Series
Page 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 ...
Page 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Page 4: ......
Page 14: ......
Page 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Page 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Page 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Page 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Page 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Page 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Page 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Page 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Page 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Page 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Page 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Page 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Page 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Page 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Page 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Page 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Page 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Page 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Page 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Page 406: ...26 Package Dimensions TMP89FM42 ...
Page 408: ......