- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383633 > mPD789326GB-xxx-8ET (NEC Corp.) 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash PDF資料下載
參數(shù)資料
| 型號： | mPD789326GB-xxx-8ET |
| 廠商： | NEC Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| 中文描述： | 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存 |
| 文件頁數(shù)： | 28/96頁 |
| 文件大小： | 482K |
| 代理商： | MPD789326GB-XXX-8ET |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁當(dāng)前第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁
Preliminary Product Information U14673EJ1V0PM00
28
μ
PD789322,789324,789326,789327
5.2.3 Clock generator control registers
The clock generator is controlled by the following three registers.
Processor clock control register (PCC)
Subclock oscillation mode register (SCKM)
Subclock control register (CSS)
(1) Processor clock control register (PCC)
This register is used to select the CPU clock and set the frequency division ratio.
PCC is set using a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to 02H.
Figure 5-8. Format of Processor Clock Control Register
Symbol
<7>
6
5
4
3
2
1
0
Address
After reset
R/W
PCC
MCC
0
0
0
0
0
PCC1
0
FFFBH
02H
R/W
MCC
Main system clock oscillator operation control
0
Operation enabled
1
Operation stopped
CSS0
PCC1
CPU clock (f
CPU
) selection
Note
Minimum instruction execution time: 2f
CPU
0
0
f
X
(0.2
μ
s)
0.4
μ
s
0
1
f
X
/2
2
(0.8
μ
s)
1.6
μ
s
1
×
f
XT
/2 (61
μ
s)
122
μ
s
Note
The CPU clock is selected by a combination of flag settings in the PCC and CSS registers. (Refer to
5.2.3 (3) Subclock control register (CSS)
.)
Cautions 1. Always set bits 0 and 2 to 6 to 0.
2. MCC can be set only when the subsystem clock is selected as the CPU clock. Setting
MCC to 1 while the main system clock is operating is invalid.
Remarks 1.
f
X
: Main system clock oscillation frequency
2.
f
XT
: Subsystem clock oscillation frequency
3.
The parenthesized values apply to operation at f
X
= 5.0 MHz or f
XT
= 32.768 kHz.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| mPD789324 | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| mPD789326 | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| MPL135 | Big current (55A), Footprint compatible with most standard, Lower temperature rise at big current, Low DCR, Without noise |
| MPL135-0R4 | Big current (55A), Footprint compatible with most standard, Lower temperature rise at big current, Low DCR, Without noise |
| MPL135-1R0 | Big current (55A), Footprint compatible with most standard, Lower temperature rise at big current, Low DCR, Without noise |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPD789327 | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| MPD789327GB-XXX-8ET | 制造商:NEC 制造商全稱:NEC 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLER |
| MPD789425 | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| MPD789426 | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| MPD789445 | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。