收藏本站
参数资料
型号： 7548
厂商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述： 单芯片8位CMOS微机
文件页数： 14/73页
文件大小： 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.
相关PDF资料
PDF描述
7549 SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
75HQ SCHOTTKY RECTIFIER
75HQ030 SCHOTTKY RECTIFIER
75HQ035 SCHOTTKY RECTIFIER
75HQ040 SCHOTTKY RECTIFIER
相关代理商/技术参数
参数描述
7548_07 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:Standard Characteristics
7548_0710 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
75481-001 功能描述:集管和线壳 BACKPANEL PINS RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector
75481-002 功能描述:集管和线壳 BERGPIN - WITH LARGE STA-R RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector
75481-004 功能描述:集管和线壳 BERGPIN RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*