4-4
MSM66591/ML66592 User's Manual
Chapter 4 CPU Control Functions
• OST0 (Bit 4) and OST1 (Bit 5)
OST0 (bit 4) and OST1 (bit 5) of SBYCON set the timing to the supply clock for the
CPU after the original oscillation clock oscillates when STOP mode is cleared by an
interrupt request.
OST1
Selected Clock Frequency
0
0
262144
0
1
131072
1
0
65536
1
1
Setting inhibited
OST0
Do not set both OST1 and OST0 to "1".
4.1.2 Operation in Each Standby Mode
[1]
HALT Mode
The MSM66591/ML66592 enter HALT mode if HLT (bit 1) of SBYCON is set to "1".
In HALT mode, the original oscillation clock operates, and the TBC, the WDT, the
flexible timer, serial ports, etc. also operate. However the clock supply to the CPU
stops, therefore instructions are not executed. All executions stop at the beginning of
the instruction following the one that set HLT (bit 1) of SBYCON to "1".
HALT mode is cleared when an interrupt request is generated, an
RES
pin is input, or
when reset by WDT occurs. If HALT mode is cleared by a non-maskable interrupt,
HALT mode is cleared unconditionally, and the CPU executes a non-maskable interrupt
process.
A maskable interrupt clears HALT mode if both an interrupt request flag (IRQ bit) and
an interrupt enable flag (IE bit) are "1".
After HALT mode is cleared, the maskable interrupt process is executed if the master
interrupt enable flag (MIE of PSW) is "1".
If the master interrupt enable flag (MIE of PSW) is "0", the instruction next to the
instruction that set the device to HALT mode (instruction that set HLT (bit 1) of
SBYCON to "1") is executed.
However, if, in a non-maskable interrupt routine, HALT mode is set and then cleared by
an interrupt request, the instruction following the instruction that set HALT mode is
executed. Also, if interrupt priority has been set (MIP = "1") and halt mode is entered
from within a high-priority interrupt routine, then halt mode can be released by interrupt
requests of lower priority but the lower priority interrupt process is not executed even
though MIE is "1". Instead the instruction following the instruction that set halt mode is
executed.
If HALT mode is cleared by a
RES
pin input or by the WDT, the CPU performs a reset
process.
Содержание MSM66591
Страница 1: ...MSM66591 ML66592 User s Manual CMOS 16 bit microcontroller FEUL66591 66592 01 Issue Date Mar 4 2002...
Страница 15: ...Contents 12...
Страница 17: ......
Страница 18: ...Overview Chapter 1 1...
Страница 19: ......
Страница 30: ...Description of Pins Chapter 2 2...
Страница 31: ......
Страница 44: ...CPU Architecture Chapter 3 3...
Страница 45: ......
Страница 101: ...3 56 MSM66591 ML66592User sManual Chapter 3 CPU Architecture...
Страница 102: ...CPU Control Functions Chapter 4 4...
Страница 103: ......
Страница 111: ...4 8 MSM66591 ML66592User sManual Chapter 4 CPU Control Functions...
Страница 112: ...Memory Control Functions Chapter 5 5...
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Страница 117: ...5 4 MSM66591 ML66592User sManual Chapter 5 Memory Control Functions...
Страница 118: ...Port Functions Chapter 6 6...
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Страница 152: ...Output Pin Control Pin OE Chapter 7 7...
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Страница 155: ...7 2 MSM66591 ML66592User sManual Chapter 7 Output Pin Control Pin OE...
Страница 156: ...Clock Generation Circuit Chapter 8 8...
Страница 157: ......
Страница 160: ...Time Base Counter TBC Chapter 9 9...
Страница 161: ......
Страница 164: ...Watchdog Timer WDT Chapter 10 10...
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Страница 170: ...Flexible Timer FTM Chapter 11 11 11...
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Страница 213: ...11 42 MSM66591 ML66592User sManual Chapter 11 Flexible Timer FTM...
Страница 214: ...General Purpose 8 Bit Timer Function Chapter 12 12...
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Страница 223: ...12 8 MSM66591 ML66592User sManual Chapter 12 General Purpose 8 Bit Timer Function...
Страница 224: ...PWM Functions Chapter 13 13...
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Страница 244: ...Baud Rate Generator Functions Chapter 14 14...
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Страница 263: ...14 18 MSM66591 ML66592User sManual Chapter 14 Baud Rate Generator Functions...
Страница 264: ...Serial Port Functions Chapter 15 15...
Страница 265: ......
Страница 348: ...A D Converter Functions Chapter 16 16...
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Страница 381: ...16 32 MSM66591 ML66592User sManual Chapter 16 A D Converter Functions...
Страница 382: ...Transition Detector Functions Chapter 17 17...
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Страница 387: ...17 4 MSM66591 ML66592User sManual Chapter 17 Transition Detector Functions...
Страница 388: ...Peripheral Functions Chapter 18 18...
Страница 389: ......
Страница 392: ...External Interrupt Request Function Chapter 19 19...
Страница 393: ......
Страница 396: ...Interrupt Request Processing Function Chapter 20 20...
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Страница 407: ...20 10 MSM66591 ML66592User sManual Chapter 20 Interrupt Request Processing Function...
Страница 408: ...Bus Port Functions Chapter 21 21...
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Страница 413: ...21 4 MSM66591 ML66592User sManual Chapter 21 Bus Port Functions...
Страница 414: ...Expansion Port Chapter 22 22...
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Страница 420: ...Serial Port with FIFO SCI5 Chapter 23 23...
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Страница 431: ...23 10 MSM66591 ML66592User sManual Chapter 23 Serial Port with FIFO SCI5...
Страница 432: ...RAM Monitor Function Chapter 24 24...
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Страница 441: ...24 8 MSM66591 ML66592User sManual Chapter 24 RAM Monitor Function...
Страница 442: ...25 Electrical Characteristics Chapter 25...
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Страница 458: ...Package Dimensions Chapter 26 26...
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Страница 461: ...26 2 MSM66591 ML66592User sManual Chapter 26 Package Dimensions...
Страница 462: ...Revision History Chapter 27 27...
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Страница 465: ...27 2 MSM66591 ML66592User sManual Chapter 27 Revision History...