![Oki ML66592 User Manual Download Page 108](http://html1.mh-extra.com/html/oki/ml66592/ml66592_user-manual_729265108.webp)
4-5
MSM66591/ML66592 User's Manual
Chapter 4 CPU Control Functions
4
[2]
STOP Mode
Writing n5H and nAH (n = 0–F) consecutively to STPACP will set the stop code accep-
tor to "1". Setting the STP bit of SBYCON to "1" at that point will set the device in stop
mode. STPACP will be set to "0" at the same time stop mode is entered.
In STOP mode, the original oscillation clock stops, therefore the TBC, the WDT, the
flexible timer, serial ports, etc. also stop. If the external clock is selected, the general-
purpose 8-bit timer (GTMC) and the 8-bit event counter (GEVC) operate. The edge
specification of the external clock is invalid, and the falling edge is always selected for
operation.
The clock supply to the CPU also stops therefore instructions are not executed, and
all executions stop at the beginning of the instruction following the one that set STP (bit
0) of SBYCON to "1".
STOP mode is cleared either when an interrupt request is generated or when the
RES
pin is input.
If STOP mode is cleared by a non-maskable interrupt, STOP mode is cleared
unconditionally, and the CPU executes a non-maskable interrupt process.
A maskable interrupt request clears STOP mode if both an interrupt request flag (IRQ
bit) and an interrupt generation enable flag (IE bit) are "1".
After STOP 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 STOP mode (instruction that set STP (bit 0) of SBYCON to "1") is
executed.
However, if, in a non-maskable interrupt routine, STOP mode is set and then cleared by
an interrupt request, the instruction following the instruction that set STOP mode is
executed. Also, if interrupt priority has been set (MIP = "1") and stop mode is entered
from within a high-priority interrupt routine, then stop 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 stop mode is
executed.
If STOP mode is cleared by an interrupt request, the original oscillation clock starts
oscillating, and after the number of clocks specified by OST0 and 1 (bits 4 and 5) of
SBYCON have elapsed, operation after STOP mode is started.
Figure 4-2 shows STOP mode timing.
If STOP mode is cleared by a
RES
pin input, the CPU performs a reset process. If
STOP mode is cleared by a
RES
pin input, apply "L" level to the
RES
pin until more than
1 ms has elapsed after the original oscillation clock stabilizes.
When setting or clearing STOP mode, do so within the guaranteed operating range for
the power supply voltage.
Summary of Contents for ML66592
Page 15: ...Contents 12 ...
Page 17: ......
Page 18: ...Overview Chapter 1 1 ...
Page 19: ......
Page 30: ...Description of Pins Chapter 2 2 ...
Page 31: ......
Page 44: ...CPU Architecture Chapter 3 3 ...
Page 45: ......
Page 101: ...3 56 MSM66591 ML66592User sManual Chapter 3 CPU Architecture ...
Page 102: ...CPU Control Functions Chapter 4 4 ...
Page 103: ......
Page 111: ...4 8 MSM66591 ML66592User sManual Chapter 4 CPU Control Functions ...
Page 112: ...Memory Control Functions Chapter 5 5 ...
Page 113: ......
Page 117: ...5 4 MSM66591 ML66592User sManual Chapter 5 Memory Control Functions ...
Page 118: ...Port Functions Chapter 6 6 ...
Page 119: ......
Page 152: ...Output Pin Control Pin OE Chapter 7 7 ...
Page 153: ......
Page 155: ...7 2 MSM66591 ML66592User sManual Chapter 7 Output Pin Control Pin OE ...
Page 156: ...Clock Generation Circuit Chapter 8 8 ...
Page 157: ......
Page 160: ...Time Base Counter TBC Chapter 9 9 ...
Page 161: ......
Page 164: ...Watchdog Timer WDT Chapter 10 10 ...
Page 165: ......
Page 170: ...Flexible Timer FTM Chapter 11 11 11 ...
Page 171: ......
Page 213: ...11 42 MSM66591 ML66592User sManual Chapter 11 Flexible Timer FTM ...
Page 214: ...General Purpose 8 Bit Timer Function Chapter 12 12 ...
Page 215: ......
Page 223: ...12 8 MSM66591 ML66592User sManual Chapter 12 General Purpose 8 Bit Timer Function ...
Page 224: ...PWM Functions Chapter 13 13 ...
Page 225: ......
Page 244: ...Baud Rate Generator Functions Chapter 14 14 ...
Page 245: ......
Page 263: ...14 18 MSM66591 ML66592User sManual Chapter 14 Baud Rate Generator Functions ...
Page 264: ...Serial Port Functions Chapter 15 15 ...
Page 265: ......
Page 348: ...A D Converter Functions Chapter 16 16 ...
Page 349: ......
Page 381: ...16 32 MSM66591 ML66592User sManual Chapter 16 A D Converter Functions ...
Page 382: ...Transition Detector Functions Chapter 17 17 ...
Page 383: ......
Page 387: ...17 4 MSM66591 ML66592User sManual Chapter 17 Transition Detector Functions ...
Page 388: ...Peripheral Functions Chapter 18 18 ...
Page 389: ......
Page 392: ...External Interrupt Request Function Chapter 19 19 ...
Page 393: ......
Page 396: ...Interrupt Request Processing Function Chapter 20 20 ...
Page 397: ......
Page 407: ...20 10 MSM66591 ML66592User sManual Chapter 20 Interrupt Request Processing Function ...
Page 408: ...Bus Port Functions Chapter 21 21 ...
Page 409: ......
Page 413: ...21 4 MSM66591 ML66592User sManual Chapter 21 Bus Port Functions ...
Page 414: ...Expansion Port Chapter 22 22 ...
Page 415: ......
Page 420: ...Serial Port with FIFO SCI5 Chapter 23 23 ...
Page 421: ......
Page 431: ...23 10 MSM66591 ML66592User sManual Chapter 23 Serial Port with FIFO SCI5 ...
Page 432: ...RAM Monitor Function Chapter 24 24 ...
Page 433: ......
Page 441: ...24 8 MSM66591 ML66592User sManual Chapter 24 RAM Monitor Function ...
Page 442: ...25 Electrical Characteristics Chapter 25 ...
Page 443: ......
Page 458: ...Package Dimensions Chapter 26 26 ...
Page 459: ......
Page 461: ...26 2 MSM66591 ML66592User sManual Chapter 26 Package Dimensions ...
Page 462: ...Revision History Chapter 27 27 ...
Page 463: ......
Page 465: ...27 2 MSM66591 ML66592User sManual Chapter 27 Revision History ...