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TMP89FM42
RA001
(1)
Normal release mode (IMF, EF5, TBTCR<TBTEN> = "0")
The IDLE0 or SLEEP0 mode is released when the falling edge of the source clock selected at
TBTCR<TBTCK> is detected. After the IDLE0 or SLEEP0 mode is released, the operation is
restarted by the instruction that follows the IDLE0 or SLEEP0 mode start instruction.
When TBTCR<TBTEN> is "1", the time base timer interrupt latch is set.
(2)
Interrupt release mode (IMF, EF5, TBTCR<TBTEN> = "1")
The IDLE0 or SLEEP0 mode is released when the falling edge of the source clock selected at
TBTCR<TBTCK> is detected. After the release, the INTTBT interrupt processing is started.
Note 1: The IDLE0 or SLEEP0 mode is released to the NORMAL1 or SLOW1 mode by the asynchro-
nous internal clock selected at TBTCR<TBTCK>. Therefore, the period from the start to the
release of the mode may be shorter than the time specified at TBTCR<TBTCK>.
Note 2: When a watchdog timer interrupt is generated immediately before the IDLE0 or SLEEP0 mode
is started, the watchdog timer interrupt will be processed but the IDLE0 or SLEEP0 mode will
not be started.
2.3.6.4
SLOW mode
The SLOW mode is controlled by system control register 2 (SYSCR2).
(1)
Switching from the NORMAL2 mode to the SLOW1 mode
Set SYSCR2<SYSCK> to "1".
When a maximum of 2/fcgck + 10/fs [s] has elapsed since SYSCR2<SYSCK> is set to "1", the
main system clock (fm) is switched to fs/4.
After switching, wait for 2 machine cycles or longer, and then clear SYSCR2<XEN> to "0" to turn
off the high-frequency clock oscillator.
If the oscillation of the low-frequency clock (fs) is unstable, confirm the stable oscillation at the
warm-up counter before implementing the procedure described above.
Note 1: Be sure to follow this procedure to switch the operation from the NORMAL2 mode to the
SLOW1 mode.
Note 2: It is also possible to allow the basic clock for the high-frequency clock to oscillate continuously to
return to NORMAL2 mode. However, be sure to turn off the oscillation of the basic clock for the
high-frequency clock when the STOP mode is started from the SLOW mode.
Note 3: After switching SYSCR2<SYSCK>, be sure to wait for 2 machine cycles or longer before clear-
ing SYSCR2<XEN> to "0". Clearing it within 2 machine cycles causes a system clock reset.
Note 4: When the main system clock (fm) is switched, the gear clock (fcgck) is synchronized with the
clock that is a quarter of the basic clock (fs) for the low-frequency clock. For the synchronization,
fm is stopped for a period of 10/fs or shorter.
Figure 2-12 Switching of the Main System Clock (fm) (Switching from fcgck to fs/4)
Gear clock (fcgck)
When the rising edge of fcgck is
detected twice after SYSCR2<SYSCK>
is changed from 0 to 1, f is stopped
for synchronization.
When the rising edge of fs/4 is detected
twice after fm is stopped, fm is switched to fs.
Quarter of the low-frequency clock
(fs/4)
Main system clock
SYSCR2<SYSCK>
10/fs (max.)
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: ......