AT90S1200-4YI Atmel, AT90S1200-4YI Datasheet - Page 46

• Manufacturer Part Number: AT90S1200-4YI
• Description: IC MCU 1K FLSH 4MHZ LV IT 20SSOP
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S1200-4YI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI
• Peripherals: POR, WDT
• Number Of I /o: 15
• Program Memory Size: 1KB (512 x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Ram Size: -
• Data Converters: -

Figure 35. Serial Programming Waveforms
Table 19. Serial Programming Instruction Set for AT90S1200
Note:
Note:
46
Instruction
Programming
Enable
Chip Erase
Read Program
Memory
Write Program
Memory
Read EEPROM
Memory
Write EEPROM
Memory
Write Lock Bits
Read Signature
Byte
a = address high bits, b = address low bits, H = 0 – Low byte, 1 – High byte, o = data out, i = data in, x = don’t care, 1 = Lock
Bit 1, 2 = Lock Bit 2
1. The signature bytes are not readable in lock mode 3 (i.e., both Lock bits programmed).
AT90S1200
1010 1100
1010 1100
0010 H000
0100 H000
1010 0000
1100 0000
1010 1100
0011 0000
Byte 1
0101 0011
100x xxxx
0000 000a
0000 000a
0000 0000
0000 0000
1111 1211
xxxx xxxx
Byte 2
Instruction Format
xxxx xxxx
xxxx xxxx
bbbb bbbb
bbbb bbbb
00bb bbbb
00bb bbbb
xxxx xxxx
xxxx xxbb
Byte 3
xxxx xxxx
xxxx xxxx
oooo oooo
iiii iiii
oooo oooo
iiii iiii
xxxx xxxx
oooo oooo
Byte4
Operation
Enable serial programming while RESET is low.
Chip erase both Flash and EEPROM memory
arrays.
Read H (high or low) byte o from program memory at
word address a:b.
Write H (high or low) byte i to program memory at
word address a:b.
Read data o from EEPROM memory at address b.
Write data i to EEPROM memory at address b.
Write Lock bits. Set bits 1,2 = “0” to program Lock
bits.
Read signature byte o from address b.
(1)
0838H–AVR–03/02