參數(shù)資料
型號: PSD954F2V-12MI
廠商: 意法半導(dǎo)體
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: Advanced PFC/PWM Combination Controllers 20-PDIP -40 to 105
中文描述: Flash在系統(tǒng)可編程ISP的外設(shè)的8位微控制器
文件頁數(shù): 26/94頁
文件大?。?/td> 476K
代理商: PSD954F2V-12MI
PSD9XX Family
Preliminary Information
22
Figure 3. Data Polling Flow Chart
START
READ DQ5 & DQ7
at Valid Address
FAIL
Program/Erase
Operation Not
Complete, Issue
Reset Instruction
PASS
Program/Erase
Operation is
Complete
YES
YES
YES
NO
NO
NO
=
DATA7
DQ5
=1
=
DATA
READ DQ7
The
PSD9XX
Functional
Blocks
(cont.)
9.1.1.6.2 Data Toggle
Checking the Data Toggle bit on DQ6 is a method of determining whether a Program or
Erase instruction is in progress or has completed. Figure 4 shows the Data Toggle
algorithm.
When the MCU issues a programming instruction, the embedded algorithm within the
PSD9XX begins. The MCU then reads the location of the byte to be programmed in
Flash to check status. Data bit DQ6 of this location will toggle each time the MCU reads
this location until the embedded algorithm is complete. The MCU continues to read this
location, checking DQ6 and monitoring the Error bit on DQ5. When DQ6 stops toggling
(two consecutive reads yield the same value), and the Error bit on DQ5 remains
0
, then
the embedded algorithm is complete. If the Error bit on DQ5 is
1
, the MCU should test
DQ6 again, since DQ6 may have changed simultaneously with DQ5 (see Figure 4).
The Error bit at DQ5 will be set if either an internal timeout occurred while the embedded
algorithm attempted to program the byte, or if the MCU attempted to program a
1
to a bit
that was not erased (not erased is logic
0
).
相關(guān)PDF資料
PDF描述
PSD954F2V-90J Advanced PFC/PWM Combination Controllers 20-SOIC -40 to 105
PSD954F2V-90M Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD954F2V-12JI Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD934F2 Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD934F2-70J Flash In-System Programmable ISP Peripherals For 8-bit MCUs
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