IC89C52 Datasheet, PDF (7/22 Pages) Integrated Circuit Solution Inc – CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8(4)-Kbytes of FLASH

IC89C52(51)A
OPERATING DESCRIPTION
The detail description of the IC89C52(51)A included in this description are:
• Memory Map and Registers
• Timer/Counters
• Serial Interface
• Interrupt System
• Other Information
The detail information desription of the IC89C52(51)A refer to IC80C52/32 data sheet
Programming the IC89C52(51)A:
The IC89C52(51)A is normally shipped the on-chip
Flash memory array in the erased state (i.e. contents=FFH)
and ready to be programmed. The IC89C52(51)A is
programmed byte-by-byte in programming mode. Before
the on-chip flash code memory can be re-programmed, the
entire memory array must be erased electrically.
Programming Interface:
Some conditions must be satisfied before entering the
programming mode. The conditions are listed following.
1. RST is high level
2. PSEN is low level
3. P3.6 and P3.7 is high level
The interface-controlled signals are matched these
conditions, then the IC89C52(51)A will enter received
command mode. The flash command is accepted by the
flash command decoder in command received mode. The
programming interface is listed in figure 5.
H
L
PROG pulse
12V/H
Command Write
Output Enable
H
H
1-12MHz Clock
RST
PSEN
ALE/PROG
EA/VPP
P2.6
P2.7
P3.6
P3.7
XTAL1
VSS
VCC
VCC
10K
P0
D7-D0
P1
A7-A0
P2.4-2.0
A12-A8
Figure 5. Programming Interface
Integrated C ircuitSolution Inc.
7
MC008-0C 11/27/2001