gc80c520g CORERIVER Semiconductor, gc80c520g Datasheet - Page 55

• Manufacturer Part Number: gc80c520g
• Description: Eprom / Rom / Romless Based 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

6.17. EPROM
Programming & verify timing is very similar to that of Intel 87C52.
Write Voltage : 11.5V ± 0.5V
Write Pulse Width : Min. 100us ~ Max. 500us
Erase Time : 20 minutes in UV-light (15mW/cm
44-pin PLCC requires an additional adaptor.
Lock Bits
Program
Program Encryption
Program Code Data
Verify Code Data
Read Signature
Mode
Array
Bit 1
Bit 2
Bit 3
RESET PSEN
H
H
H
H
H
H
H
L
L
L
L
L
L
L
ROM Writer Interface
ALE
H
H
11.5V
11.5V
11.5V
11.5V
11.5V
VPP
5V
5V
P2.6
H
H
H
L
L
L
L
2
)
P2.7
H
H
H
H
L
L
L
P3.3
H
H
H
H
H
L
L
P3.6
H
H
H
H
L
L
L
P3.7
H
H
H
H
L
L
L
[EPROM Cell Configuration In Physical Layout]
VPP = 11.5V and ALE Low Pulse
Code = (Main byte) XNOR (Encryption byte)
VPP = 11.5V and ALE Low Pulse
LOCK1 = 1 : MOVC Instruction Disable.
LOCK2 = 1 : Same as LOCK1
LOCK3 = 1 : Same as LOCK1 and LOCK2.
30h = C0h
31h = 87h
60h = 52h
Encryption Cell (64 bytes)
MiDAS1.0 Family
Signature Cell (3 bytes)
Lock Bit Cell (3 bits)
Functional Description
Further Programming Disable.
and Verify Disable.
External Code Execution Disable.
(4K / 8Kbytes)
Main Cell
(CORERIVER)
(Product)
(EPROM Size)
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