參數(shù)資料
型號(hào)： 7548
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述： 單芯片8位CMOS微機(jī)
文件頁數(shù)： 14/73頁
文件大?。?/td> 1255K
代理商： 7548
Rev.2.00
REJ03B0210-0200
Mar 15, 2007
Page 14 of 70
7548 Group
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
Fig 10. Structure of Function set ROM data 0
Fig 11. Structure of Function set ROM data 1
Fig 12. Structure of Function set ROM data 2
Low voltage detection circuit valid bit
0: Low voltage detection circuit invalid
1: Low voltage detection circuit valid
Set “0” to this bit certainly.
Set “1” to this bit certainly.
b7
Function set ROM data 0
(FSROM0: address FFD8
16
)
b0
Oscillation method selection bits (Note 1)
b1 b0
0 0: Clock pins not used (P2
0
/X
OUT
and P2
1
/X
IN
are used as
I/O ports)
0 1: Ceramic resonator or quarts-crystal oscillator
1 0: 32 kHz quarts-crystal oscillator
1 1: External clock input (P2
1
/X
IN
pin is used as I/O port)
Low voltage detection circuit valid bit in the stop mode (Note 2)
0: Low voltage detection circuit invalid in the stop mode
1: Low voltage detection circuit valid in the stop mode
Set “0” to these bits certainly.
Set “1” to this bit certainly.
b7
Function set ROM data 1
FSROM1 (FFD9
16
)
b0
Notes1:
The P2
0
/X
OUT
and P2
1
/X
IN
pins build in an on-chip oscillator. Even if these pins are used
as I/O ports, the oscillator circuit is enabled when the MCU’s Vcc voltage drops below
the operation limit voltage. In this case these pins may output undefined values.
2:
When the Low voltage detection circuit is set to be valid in the stop mode, the dissipation
current in the stop mode is increased.
Watchdog timer source clock selection bit
0 : Low-speed on-chip oscillator/16
1 : System clock/16
Watchdog timer start selection bit
0 : Start watchdog timer
1 : Stop watchdog timer
Watchdog timer H count source initial value
selection bit
0 : Initial value of bit 7 of WDTCON
after reset release is “0”
1 : Initial value of bit 7 of WDTCON
after reset release is “1”
STP instruction function selection bit
0 : System enters into the stop mode
at the STP instruction execution
1 : Internal reset occurs at the STP
instruction execution
Low-speed on-chip oscillator control bit
(Note 1)
0 : Stop of low-speed on-chip oscillator
disabled
1 : Stop of low-speed on-chip oscillator
enabled
Set “0” to these bits certainly.
b7
Function set ROM data 2
FSROM2 (FFDA
16
)
b0
Note 1:
If “0” is set to this bit, it is not possible to write “1” to bit 0 in the clock
mode register. Also, the low-speed on-chip oscillator does not stop
even if the STP instruction is executed.
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PDF描述
7549 SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
7548_07 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Standard Characteristics
7548_0710 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
75481-001 功能描述:集管和線殼 BACKPANEL PINS RoHS:否 產(chǎn)品種類:1.0MM Rectangular Connectors 產(chǎn)品類型:Headers - Pin Strip 系列:DF50 觸點(diǎn)類型:Pin (Male) 節(jié)距:1 mm 位置/觸點(diǎn)數(shù)量:16 排數(shù):1 安裝風(fēng)格:SMD/SMT 安裝角:Right 端接類型:Solder 外殼材料:Liquid Crystal Polymer (LCP) 觸點(diǎn)材料:Brass 觸點(diǎn)電鍍:Gold 制造商:Hirose Connector
75481-002 功能描述:集管和線殼 BERGPIN - WITH LARGE STA-R RoHS:否 產(chǎn)品種類:1.0MM Rectangular Connectors 產(chǎn)品類型:Headers - Pin Strip 系列:DF50 觸點(diǎn)類型:Pin (Male) 節(jié)距:1 mm 位置/觸點(diǎn)數(shù)量:16 排數(shù):1 安裝風(fēng)格:SMD/SMT 安裝角:Right 端接類型:Solder 外殼材料:Liquid Crystal Polymer (LCP) 觸點(diǎn)材料:Brass 觸點(diǎn)電鍍:Gold 制造商:Hirose Connector
75481-004 功能描述:集管和線殼 BERGPIN RoHS:否 產(chǎn)品種類:1.0MM Rectangular Connectors 產(chǎn)品類型:Headers - Pin Strip 系列:DF50 觸點(diǎn)類型:Pin (Male) 節(jié)距:1 mm 位置/觸點(diǎn)數(shù)量:16 排數(shù):1 安裝風(fēng)格:SMD/SMT 安裝角:Right 端接類型:Solder 外殼材料:Liquid Crystal Polymer (LCP) 觸點(diǎn)材料:Brass 觸點(diǎn)電鍍:Gold 制造商:Hirose Connector
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