IC89E54 Datasheet, PDF (35/36 Pages) Integrated Circuit Solution Inc – 8-BITS SINGLE MICROCONTROLLER with 16/32/64-Kbytes of FLASH, 256 byte +512 byte RAM

IC89E54/58/64
P2.6
P0[7-0]
1st stage
test mode
tSLSH ^enable
tCVSL
tPHCH
89H
59H
89H
2rd stage
test mode
enable
59H
Figure 26. Test Mode Entering Timing
Note:
1. EA, PROG, P3.7, P2.7 are high level; P3.6 is lower level.
Vcc — 0.5V
0.45V
0.7Vcc
0.2Vcc — 0.1
tCHCL
tCLCX
tCHCX
tCLCH
tCLCL
Figure 27. External Clock Drive Waveform
Vcc - 0.5V
0.45V
0.2Vcc + 0.9V
0.2Vcc - 0.1V
Figure 28. AC Test Point
Note:
1.AC inputs during testing are driven at Vcc-0.5v for logic “1” and 0.45V for logic “0”.
Timing measurements are made at Vih min for logic “1” and max for logic “0”.
Integrated C ircuitSolution Inc.
35
MC012-0C 11/16/2001