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| 型號(hào)： | MB90T678PF |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT BUFFERS/DRIVERS WITH 3-STATE OUTPUTS 48-CFP -55 to 125 |
| 中文描述： | 16-BIT, 16 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | PLASTIC, QFP-100 |
| 文件頁(yè)數(shù)： | 22/124頁(yè) |
| 文件大?。?/td> | 2584K |
| 代理商： | MB90T678PF |
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MB90670/675 Series
22
6. Turning-on Sequence of Power Supply to A/D Converter and Analog Inputs
Make sure to turn on the A/D converter power supply (AV
CC
, AVRH, AVRL) and analog inputs (AN0 to AN7)
after turning-on the digital power supply (V
CC
).
Turn-off the digital power after turning off the A/D converter supply and analog inputs. In this case, make sure
that the voltage not exceed AVRH or AV
CC
(turning on/off the analog and digital power supplies simultaneously
is acceptable).
7. Connection of Unused Pins of A/D Converter
Connect unused pins of A/D converter to AV
CC
= V
CC
, AV
SS
= AVRH = V
SS
.
8. “MOV @AL, AH”, “MOVW @AL, AH” Instructions
When the above instruction is performed to I/O space, an unnecessary writing operation (#FF, #FFFF) may be
performed in the internal bus.
Use the compiler function for inserting an NOP instruction before the above instructions to avoid the writing
operation.
Accessing RAM space with the above instruction does not cause any problem.
9. Initialization
In the device, there are internal registers which is initialized only by a power-on reset. To initialize these registers,
turning on the power again.
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