AT89C5131A-M Atmel Corporation, AT89C5131A-M Datasheet - Page 37
AT89C5131A-M
Manufacturer Part Number
AT89C5131A-M
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT89C5130A-M.pdf
(188 pages)
2.AT89C5130A-M.pdf
(4 pages)
3.AT89C5130A-M.pdf
(34 pages)
Specifications of AT89C5131A-M
Flash (kbytes)
32 Kbytes
Max. Operating Frequency
48 MHz
Cpu
8051-12C
Max I/o Pins
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
1
Twi (i2c)
1
Uart
1
Sram (kbytes)
1.25
Eeprom (bytes)
1024
Self Program Memory
API
Operating Voltage (vcc)
2.7 to 5.5
Timers
4
Isp
UART/USB
Watchdog
Yes
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8.3.7.3
8.4
4337K–USB–04/08
Registers
Hardware Security
The following procedure is used to read the Hardware Security space and is summarized in
Figure 8-8:
Figure 8-8.
Table 8-4.
Reset Value = 0000 0000b
• Map the Hardware Security space by writing 04h in FCON register.
• Read the byte in Accumulator by executing MOVC A, @A+DPTR with A = 0 & DPTR =
0000h.
Bit Number
FPL3
7-4
2-1
7
3
0
Reading Procedure
FCON (S:D1h)
Flash Control Register
Mnemonic Description
FMOD1:0
FBUSY
FPL3:0
FPL2
FPS
Bit
6
Programming Launch Command Bits
Write 5Xh followed by AXh to launch the programming according to FMOD1:0.
(see Table 8-3.)
Flash Map Program Space
Set to map the column latch space in the data memory space.
Clear to re-map the data memory space.
Flash Mode
See Table 8-2 or Table 8-3.
Flash Busy
Set by hardware when programming is in progress.
Clear by hardware when programming is done.
Can not be cleared by software.
FPL1
5
Exec: MOVC A, @A+DPTR
Flash Spaces Reading
Flash Spaces Mapping
FCON = 00000xx0b
DPTR = Address
FPL0
Erase Mode
FCON = 00h
4
Data Read
ACC = 0
FPS
3
AT89C5130A/31A-M
FMOD1
2
FMOD0
1
FBUSY
0
37
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