参数资料
型号: TS87C51RD2-VIMR
英文描述: Microcontroller
中文描述: 微控制器
文件页数: 43/74页
文件大小: 689K
代理商: TS87C51RD2-VIMR
48
Rev. C - 06 March, 2001
TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
6.11. ONCETM Mode (ON Chip Emulation)
The ONCE mode facilitates testing and debugging of systems using TS80C51Rx2 without removing the circuit
from the board. The ONCE mode is invoked by driving certain pins of the TS80C51Rx2; the following sequence
must be exercised:
Pull ALE low while the device is in reset (RST high) and PSEN is high.
Hold ALE low as RST is deactivated.
While the TS80C51Rx2 is in ONCE mode, an emulator or test CPU can be used to drive the circuit Table 26.
shows the status of the port pins during ONCE mode.
Normal operation is restored when normal reset is applied.
Table 25. External Pin Status during ONCE Mode
ALE
PSEN
Port 0
Port 1
Port 2
Port 3
XTAL1/2
Weak pull-up
Float
Weak pull-up
Active
相关PDF资料
PDF描述
TS902C3 10 A, 300 V, SILICON, RECTIFIER DIODE
TS904AID Voltage-Feedback Operational Amplifier
TS904AIN Voltage-Feedback Operational Amplifier
TS904ID Voltage-Feedback Operational Amplifier
TS904IN IC-QUAD RAIL/RAIL OP AMP
相关代理商/技术参数
参数描述
TS87C51U2 制造商:TEMIC 制造商全称:TEMIC Semiconductors 功能描述:Double UART 8-bit CMOS Microcontroller, 0-60 MHz
TS87C51U2-EA 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller
TS87C51U2-EB 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller
TS87C51U2-EE 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller
TS87C51U2-EJ 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller