ATA6613-EK Atmel, ATA6613-EK Datasheet - Page 46

• Manufacturer Part Number: ATA6613-EK
• Description: BOARD DEMO LIN-MCM FOR ATA6613
• Manufacturer: Atmel

Specifications of ATA6613-EK

• Main Purpose: Interface, LIN + MCU
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATA6613
• Primary Attributes: LIN-SBC (System-Basis-Chip) Transceiver, LIN 2.0, Voltage Regulator, Window Watchdog
• Secondary Attributes: 16 kB Flash, 4 Power Modes: Pre-Normal, Normal, Sleep, Silent, 48-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

46
Atmel ATA6612/ATA6613
Table 6-2.
• Bit 3 – EERIE: EEPROM Ready Interrupt Enable
• Bit 2 – EEMPE: EEPROM Master Write Enable
• Bit 1 – EEPE: EEPROM Write Enable
1. Wait until EEPE becomes zero.
2. Wait until SELFPRGEN in SPMCSR becomes zero.
3. Write new EEPROM address to EEAR (optional).
4. Write new EEPROM data to EEDR (optional).
5. Write a logical one to the EEMPE bit while writing a zero to EEPE in EECR.
6. Within four clock cycles after setting EEMPE, write a logical one to EEPE.
EEPM1
The Programming times for the different modes are shown in
set, any write to EEPMn will be ignored. During reset, the EEPMn bits will be reset to 0b00
unless the EEPROM is busy programming.
Writing EERIE to one enables the EEPROM Ready Interrupt if the I bit in SREG is set.
Writing EERIE to zero disables the interrupt. The EEPROM Ready interrupt generates a
constant interrupt when EEPE is cleared.
The EEMPE bit determines whether setting EEPE to one causes the EEPROM to be writ-
ten. When EEMPE is set, setting EEPE within four clock cycles will write data to the
EEPROM at the selected address If EEMPE is zero, setting EEPE will have no effect.
When EEMPE has been written to one by software, hardware clears the bit to zero after
four clock cycles. See the description of the EEPE bit for an EEPROM write procedure.
The EEPROM Write Enable Signal EEPE is the write strobe to the EEPROM. When
address and data are correctly set up, the EEPE bit must be written to one to write the
value into the EEPROM. The EEMPE bit must be written to one before a logical one is
written to EEPE, otherwise no EEPROM write takes place. The following procedure
should be followed when writing the EEPROM (the order of steps 3 and 4 is not essential):
The EEPROM can not be programmed during a CPU write to the Flash memory. The soft-
ware must check that the Flash programming is completed before initiating a new
EEPROM write. Step 2 is only relevant if the software contains a Boot Loader allowing the
CPU to program the Flash. If the Flash is never being updated by the CPU, step 2 can be
omitted. See
ATA6612 and ATA6613” on page 284
Caution: An interrupt between step 5 and step 6 will make the write cycle fail, since the
EEPROM Master Write Enable will time-out. If an interrupt routine accessing the
EEPROM is interrupting another EEPROM access, the EEAR or EEDR Register will be
modified, causing the interrupted EEPROM access to fail. It is recommended to have the
Global Interrupt Flag cleared during all the steps to avoid these problems.
0
0
1
1
EEPM0
EEPROM Mode Bits
0
1
0
1
“Boot Loader Support – Read-While-Write Self-Programming, Atmel
Programming
3.4ms
1.8ms
1.8ms
Time
–
Operation
Erase and Write in one operation (Atomic Operation)
Erase Only
Write Only
Reserved for future use
for details about Boot programming.
Table
6-2. While EEPE is
9111H–AUTO–01/11