- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98069 > S1C88409D 8-BIT, MROM, 8.8 MHz, MICROCONTROLLER, UUC108 PDF資料下載
參數(shù)資料
| 型號(hào)： | S1C88409D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8.8 MHz, MICROCONTROLLER, UUC108 |
| 封裝： | DIE-108 |
| 文件頁(yè)數(shù)： | 209/250頁(yè) |
| 文件大?。?/td> | 1877K |
| 代理商： | S1C88409D |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)第151頁(yè)第152頁(yè)第153頁(yè)第154頁(yè)第155頁(yè)第156頁(yè)第157頁(yè)第158頁(yè)第159頁(yè)第160頁(yè)第161頁(yè)第162頁(yè)第163頁(yè)第164頁(yè)第165頁(yè)第166頁(yè)第167頁(yè)第168頁(yè)第169頁(yè)第170頁(yè)第171頁(yè)第172頁(yè)第173頁(yè)第174頁(yè)第175頁(yè)第176頁(yè)第177頁(yè)第178頁(yè)第179頁(yè)第180頁(yè)第181頁(yè)第182頁(yè)第183頁(yè)第184頁(yè)第185頁(yè)第186頁(yè)第187頁(yè)第188頁(yè)第189頁(yè)第190頁(yè)第191頁(yè)第192頁(yè)第193頁(yè)第194頁(yè)第195頁(yè)第196頁(yè)第197頁(yè)第198頁(yè)第199頁(yè)第200頁(yè)第201頁(yè)第202頁(yè)第203頁(yè)第204頁(yè)第205頁(yè)第206頁(yè)第207頁(yè)第208頁(yè)當(dāng)前第209頁(yè)第210頁(yè)第211頁(yè)第212頁(yè)第213頁(yè)第214頁(yè)第215頁(yè)第216頁(yè)第217頁(yè)第218頁(yè)第219頁(yè)第220頁(yè)第221頁(yè)第222頁(yè)第223頁(yè)第224頁(yè)第225頁(yè)第226頁(yè)第227頁(yè)第228頁(yè)第229頁(yè)第230頁(yè)第231頁(yè)第232頁(yè)第233頁(yè)第234頁(yè)第235頁(yè)第236頁(yè)第237頁(yè)第238頁(yè)第239頁(yè)第240頁(yè)第241頁(yè)第242頁(yè)第243頁(yè)第244頁(yè)第245頁(yè)第246頁(yè)第247頁(yè)第248頁(yè)第249頁(yè)第250頁(yè)
S1C88409 TECHNICAL MANUAL
EPSON
51
CHAPTER 5: PERIPHERAL CIRCUITS AND OPERATION (Watchdog Timer)
5.3 Watchdog Timer
5.3.1 Configuration of watchdog timer
The S1C88409 has a built-in watchdog timer that detects CPU runaway.
OSC1
oscillation circuit
Clock
selector
1/16
divider
WDCL
Watchdog timer
(12 bits)
WDRST
EWD
fOSC1
OSC3
oscillation circuit
1/16
divider
fOSC3
Overflow
Non-maskable
interrupt (NMI)
Fig. 5.3.1.1 Block diagram of watchdog timer
The watchdog timer is composed of a 12-bit up-
counter that uses the OSC1 or OSC3 oscillation
circuit as a clock source. This counter must be reset
cyclically by software. If the counter is not reset
and an overflow occurs, the watchdog timer
generates NMI (non-maskable interrupt) to the
CPU.
Figure 5.3.1.1 is a block diagram of the watchdog
timer.
5.3.2 Control of watchdog timer
Input clock selection
The input clock of the watchdog timer can be
selected using the input clock selection register
WDCL from the two listed below.
WDCL = "1": 1/16 OSC1 dividing clock
WDCL = "0": 1/16 OSC3 dividing clock
At initial reset, the input clock is set to fOSC1/16.
The following shows an example of a watchdog
timer reset cycle according to the input clock
selected.
When fOSC1/16 is selected:
fOSC1 = 32.768 kHz within 2 sec
When fOSC3/16 is selected:
fOSC3 = 1 MHz
within 64 msec
fOSC3 = 6 MHz
within 10 msec
fOSC3 = 8 MHz
within 8 msec
The WDCL register is set to write disabling status
usually to prevent modification of the reset cycle
by a wrong writing. To change the input clock, it is
necessary to set the WDCL register in write
authorized status by writing "1" to the write enable
register WRWD beforehand. The write authoriza-
tion by the WRWD register enables only one write
for the WDCL register. When data is written to the
WDCL register after setting in write authorization,
the WRWD register returns to "0", and the WDCL
register is also returned to write disabling status.
Resetting the watchdog timer
When the watchdog timer is used, it is necessary
to reset the counter before an overflow is gener-
ated. The watchdog timer is reset by writing "1" to
the watchdog timer reset bit WDRST.
By resetting the watchdog timer on the main
routine, program runaway that does not pass the
reset routine can be detected. Ordinarily this
routine is incorporated to a place where it is
executed regularly.
Operation in HALT/SLEEP status
(1) HALT status
The OSC1 oscillation circuit and the OSC3
oscillation circuit operate in HALT status.
Therefore, the watchdog timer also operates.
The watchdog timer generates NMI when
HALT status continues more than a reset cycle.
HALT status is released at that point.
(2) SLEEP status
The OSC1 oscillation circuit and the OSC3
oscillation circuit stop in SLEEP status. There-
fore, the watchdog timer also stops. Since the
counter maintains the value at the point it
stops, the counter resumes counting from the
value after SLEEP status is canceled. However,
the oscillation clock becomes unstable immedi-
ately after SLEEP is canceled. Therefore, reset
the watchdog timer before shifting to SLEEP
status and after SLEEP status is canceled so
that an unnecessary NMI will not be generated.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| S1C88816D | 8-BIT, MROM, 8.2 MHz, MICROCONTROLLER, UUC164 |
| S1C88832F0A0100 | MICROCONTROLLER, PQFP128 |
| S1C88848D0A0100 | 8-BIT, MROM, 8.2 MHz, MICROCONTROLLER, UUC192 |
| S1C8F360F | 8-BIT, FLASH, 8.2 MHz, MICROCONTROLLER, PQFP176 |
| S1D13305F00B | 640 X 256 PIXELS CRT CHAR OR GRPH DSPL CTLR, PQFP60 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S1C88649 | 制造商:EPSON 制造商全稱:EPSON 功能描述:8-bit Single Chip Microcomputer |
| S1C88650 | 制造商:EPSON 制造商全稱:EPSON 功能描述:8-bit Single Chip Microcomputer |
| S1C88655 | 制造商:EPSON 制造商全稱:EPSON 功能描述:8-bit Single Chip Microcomputer |
| S1C88816 | 制造商:EPSON 制造商全稱:EPSON 功能描述:8-bit Single Chip Microcomputer |
| S1C88848 | 制造商:EPSON 制造商全稱:EPSON 功能描述:8-bit Single Chip Microcomputer |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。