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AT90SCR100 Datasheet(PDF) 385 Page - ATMEL Corporation

Part # AT90SCR100
Description  8-bit Microcontroller for Smart Card Readers
PDF  433 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90SCR100 Datasheet(HTML) 385 Page - ATMEL Corporation

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TPR0327AY–SMS–30Jan09
AT90SCR100
Figure 29-2.
Serial Programming Instruction example
29.7.1
Serial Programming Characteristics
For characteristics of the Serial Programming module. See “SPI Timing Characteristics
TBC/TBD” on page 413.
Figure 29-3.
Serial Programming Waveforms
29.8
Programming via the JTAG Interface
Programming through the JTAG interface requires control of the four JTAG specific pins: TCK,
TMS, TDI, and TDO. Control of the reset and clock pins is not required.
To be able to use the JTAG interface, the JTAGEN Fuse must be programmed. The device is
default shipped with the fuse programmed. In addition, the JTD bit in MCUCSR must be cleared.
Alternatively, if the JTD bit is set, the external reset can be forced low. Then, the JTD bit will be
cleared after two chip clocks, and the JTAG pins are available for programming. This provides a
Byte 1
Byte 2
Byte 3
Byte 4
Adr MSB
Adr LSB
Bit 15 B
0
Serial Programming Instruction
Program Memory/
EEPROM Memory
Page 0
Page 1
Page 2
Page N-1
Page Buffer
Write Program Memory Page/
Write EEPROM Memory Page
Load Program Memory Page (High/Low Byte)/
Load EEPROM Memory Page (page access)
Byte 1
Byte 2
Byte 3
Byte 4
Bit 15 B
0
Adr MSB
Adr LSB
Page Offset
Page Number
Adr M
MSB
A
A
Adrr LS
SB
MSB
MSB
LSB
LSB
SERIAL CLOCK INPUT
(SCK)
SERIAL DA TA INPUT
(MOSI)
(MISO)
SAMPLE
SERIAL DA TA OUTPUT



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