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EM78P813BQ Datasheet(PDF) 11 Page - ELAN Microelectronics Corp

Part # EM78P813BQ
Description  8-BIT OTP MICRO-CONTROLLER
Download  65 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P813BQ Datasheet(HTML) 11 Page - ELAN Microelectronics Corp

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EM78815 mode (must set RE page2 bit2 ~ bit4 = 1)
30us
Key scan pin(P8,P9)
VDD
GND
Fig.4(b) : EM78815 mode Key scan signal(share with IO pin)
EXSEL pin : 0/1
On-Chip program ROM used/unused switch(EM78815 mode only).
EM78P813 support MAX 128K Program . User can port program to both 64K EM78P813 on_chip ROM and
64K expand ROM .
User also can ignore 64K EM78P813 on_chip ROM and porting all programs to a external
128K ROM. Using this function, user can upgrade program or download new function easily.
EM78P813 provide Data ROM expand function. When user access data which address is over 256K, external
ROM will be load. User must set expand start address of Data ROM to RF PAGE1, PAGE2 and IOCB PAGE1. A
diagram of expand function is as below.
64K Program ROM
(PAGE0 ~ PAGE 63)
256K byte
Data ROM
EM78P813
(EXSEL pin go low)
MAX 2M Byte Expand ROM
(FLASH ROM)
64K word Program ROM
(PAGE64~PAGE127)
ExpandData ROM
Expand Data ROM start address
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
RF PAGE1
RF PAGE2
0
ROM
Address
0
ROM
Address
9
ROM
Address
17
b0
b0
b7
b7
IOCB
B7
Fig5(a) : EXSEL = 0,both internal and external program are used.


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