AT90S2313-4PC Atmel, AT90S2313-4PC Datasheet - Page 62

• Manufacturer Part Number: AT90S2313-4PC
• Description: IC MCU 2K 4MHZ UART LV 20DIP
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S2313-4PC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: SPI, UART
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 1 x 16 bit
• Operating Supply Voltage: 2.7 V to 6 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Lead Free Status / Rohs Status: No

Enter Programming Mode
Chip Erase
62
AT90S2313
Table 23. Pin Name Mapping
Table 24. XA1 and XA0 Coding
Table 25. Command Byte Bit Coding
The following algorithm puts the device in Parallel Programming mode:
1. Apply supply voltage according to Table 22, between V
2. Set the RESET and BS pin to “0” and wait at least 100 ns.
3. Apply 11.5 - 12.5V to RESET. Any activity on BS within 100 ns after +12V has
The Chip Erase command will erase the Flash and EEPROM memories, and the Lock
bits. The Lock bits are not reset until the Flash and EEPROM have been completely
erased. The Fuse bits are not changed. Chip Erase must be performed before the Flash
or EEPROM is reprogrammed.
Load Command “Chip Erase”
1. Set XA1, XA0 to “10”. This enables command loading.
2. Set BS to “0”.
3. Set DATA to “1000 0000”. This is the command for Chip Erase.
4. Give XTAL1 a positive pulse. This loads the command.
Programming Mode
XA1
0
0
1
1
Signal Name in
been applied to RESET, will cause the device to fail entering Programming
mode.
XA0
DATA
XA0
XA1
0
1
0
1
Command Byte
1000 0000
0100 0000
0010 0000
0001 0000
0001 0001
0000 1000
0000 0100
0000 0010
0000 0011
Action when XTAL1 is Pulsed
Load Flash or EEPROM Address (High or low address byte determined by BS)
Load Data (High or Low data byte for Flash determined by BS)
Load Command
No Action, Idle
Pin Name
PB7 - 0
PD5
PD6
I/O
I/O
I
I
Command Executed
Chip Erase
Write Fuse Bits
Write Lock Bits
Write Flash
Write EEPROM
Read Signature Bytes
Read Fuse and Lock Bits
Read Flash
Read EEPROM
Function
XTAL Action Bit 0
XTAL Action Bit 1
Bi-directional Data Bus (Output when OE is low)
CC
and GND.
0839I–AVR–06/02