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参数资料
| 型号： | PSD4235G2V-A-15UI |
| 厂商： | 意法半导体 |
| 英文描述： | Flash In-System-Programmable Peripherals for 16-Bit MCUs |
| 中文描述： | Flash在系统可编程外设的16位微控制器 |
| 文件页数： | 13/93页 |
| 文件大小： | 503K |
| 代理商： | PSD4235G2V-A-15UI |
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Preliminary Information
PSD4000 Series
17
FS0-7
Instruction
or
(Note 14)
CSBOOT0-3 Cycle 1 Cycle 2 Cycle 3
Cycle 4
Cycle5
Cycle 6
Cycle 7
Read (Note 5)
1
“Read”
RA RD
Read Main Flash ID
1
AAh
55h
90h
“Read”
(Note 6)
@XAAAh @X554h @XAAAh
ID
@XX02h
Read Sector Protection
1
AAh
55h
90h
“Read”
(Notes 6,8,13)
@XAAAh @X554h @XAAAh 00h or 01h
@XX04h
Program a Flash Word
1
AAh
55h
A0h
PD@PA
@XAAAh @X554h @XAAAh
Erase One Flash Sector
1
AAh
55h
80h
AAh
55h
30h
@XAAAh @X554h @XAAAh
@XAAAh
@X554h
@SA
@next SA
(Note 7)
Erase Flash Block
1
AAh
55h
80h
AAh
55h
10h
(Bulk Erase)
@XAAAh @X554h @XAAAh
@XAAAh
@X554h
@XAAAh
Suspend Sector Erase
1
B0h
(Note 11)
@xxxh
Resume Sector Erase
1
30h
(Note 12)
@xxxh
Reset (Note 6)
1
F0 @ any
address
Unlock Bypass
1
AAh
55h
20h
@XAAAh @X554h @XAAAh
Unlock Bypass Program
1
A0h
PD@PA
(Note 9)
@XXXXh
Unlock Bypass Reset
1
90h
00h
(Note 10)
@XXXXh @XXXXh
Table 8. Instructions
X
= Don’t Care. “xxxh” address in the above table must be an even address.
RA = Address of the memory location to be read.
RD = Data read from location RA during read operation.
PA = Address of the memory location to be programmed. Addresses are latched on the falling edge of the WR#
(CNTL0) pulse. PA is an even address for PSD in word programming mode.
PD = Data (word) to be programmed at location PA. Data is latched on the rising edge of WR# (CNTL0) pulse.
SA = Address of the sector to be erased or verified. The chip select (FS0-7 or CSBOOT0-3) of the sector to be
erased must be active (high).
NOTES:
1.
All bus cycles are write bus cycle except the ones with the “read” label.
2.
All values are in hexadecimal.
3.
FS0-7 and CSBOOT0-3 are active high and are defined in PSDsoft.
4.
Only Address bits A11-A0 are used in Instruction decoding.
5.
No unlock or command cycles required when device is in read mode.
6.
The Reset command is required to return to the read mode after reading the Flash ID, Sector Protect status
or if DQ5 (DQ13) goes high.
7.
Additional sectors to be erased must be entered within 80s.
8.
The data is 00h for an unprotected sector and 01h for a protected sector. In the fourth cycle, the sector chip
select is active and (A1 = 1, A0 = 0).
9.
The Unlock Bypass command is required prior to the Unlock Bypass Program command.
10. The Unlock Bypass Reset command is required to return to reading array data when the device is in the
Unlock Bypass mode.
11. The system may read and program functions in non-erasing sectors, read the Flash ID or read the Sector
Protect status, when in the Erase Suspend mode. The erase Suspend command is valid only during a sector
erase operation.
12. The Erase Resume command is valid only during the Erase Suspend mode.
13. The MCU cannot invoke these instructions while executing code from the same Flash memory for which the
instruction is intended. The MCU must fetch, for example, codes from the Secondary Flash memory when
reading the Sector Protection Status of the main Flash.
14. All write bus cycles in an instruction are byte write to even address (XA4Ah or X554h). Flash Programming
bys cycle is writing a word to even address.
The
PSD4000
Functional
Blocks
(cont.)
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