參數(shù)資料
型號： AK7716VT
英文描述： Consumer IC
中文描述： 消費性IC
文件頁數(shù)： 49/60頁
文件大?。?/td> 1171K
代理商： AK7716VT
[ASAHI KASEI]
[AK7716]
<M0057-E-01>
1999/09
- 49 -
(8) Interface for the EEPROM
8-1) How to use
AK7716 has an interface for the EEPROM. After release of I INIT_RESET . It can load the data of PRAM, CRAM, OFRAM and its
control register setting value automatically. This function can save the memory area of microcomputer.
The proper EEPROM is the AKM AK93C95A or compatible serial one.
In case of using this function, it should write a data as 8-2) PROGRAM MAP for EEPROM.
How to use this function is as follow;
At first sets the EESEL to ”H”, (after crystal oscillator start, in case of using crystal), then INIT_RESET pin sets to ”H”.
By this action, the internal counter starts to work and the AK7716 generate the control signal EECS, EESK and EEDI for EEPROM.
Then the AK7716 is loaded the data from EEDO pin of the EEPROM. When finishes all data reading, then EECS, EESK and EEDI pins
change to ”L” and EEST pin (the status pin of EEPROM interface) changes to H” and notice the finish of loading.
After EEST changes from “L” to “H”, the microcomputer interface pin is able to use even if EESEL leaving “H”.
In case of RELOAD again, leave EEST “H” and control the initial reset pin. (After sets INIT_RESET to L” then sets INIT_RESET
to ”H” again.)
8-2) PROGRAM MAP for EEPROM
Write the data from address of 0 to 1360 (decimal) as following table.
EEPROM
ADDRESS
parts
0
1
2
3
. . .
896
897
898
899
900
901
. . .
1282
1283
1284
1285
1286
1287
. . .
1354
1355
1356
1357
CONT0
1358
CONT1
1359
CONT2
1360
CONT3
Note) Write 0 data for the address does not use.
Contents of DATA
Directed of the AK7716
Upper 8bit
00000000b
Lower 8bit
C0h (Command code)
0000000000000000b
DATA(MSB,30,. . .,17,16)b ADDRESS 0
DATA(15,14, . . . ,1,LSB)b ADDRESS 0
. . .
DATA(MSB,30, . . . ,17,16)b ADDRESS 447
DATA(15,14, . . . ,1,LSB)b ADDRESS 447
00000000b
0000000000000000b
DATA(MSB,14, . . . ,1,LSB)b ADDRESS 0
DATA(MSB,14, . . . ,1,LSB)b ADDRESS 1
. . .
DATA(MSB,14, . . . ,1,LSB)b ADDRESS 382
DATA(MSB,14, . . . ,1,LSB)b ADDRESS 383
90h (Command code)
0000,DATA(MSB,18, . . . ,9,8
7,6, . . . ,1,LSB)b ADD 0
15,14, . . . ,1,LSB)b ADDRESS 1
PRAM
A0h (Command code)
CRAM
00000000b
0000,DATA(MSB,18,17,16
. . .
0000,DATA(MSB,18, . . . ,9,8
7,6, . . . ,1,LSB)b ADD 46
0000,DATA(MSB,18,17,16
OFRAM
15,14, . . . ,1,LSB)b ADDRESS 47
60h (Command code)
64h (Command code)
68h (Command code)
6Ch (Command code)
DATA(MSB,6,. . . ,1,LSB)b
DATA(MSB,6,. . . ,1,LSB)b
DATA(MSB,6,. . . ,1,LSB)b
DATA(MSB,6,. . . ,1,LSB)b
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