Rainbow Electronics ATmega128RFA1 - Manual (Page 467)

467
8266A-MCU Wireless-12/09
ATmega128RFA1
The three bytes reside in a separate address space. For the ATmega128RFA1 the
signature bytes are given in
Table 31-6 below . Accessing the signature bytes from
software is described in section "Reading the Signature Row from Software" on page
457 .
Table 31-6. Device and JTAG ID
Signature Byte Number JTAG
Part 0 1 2 Part Number Manufacturer ID
ATmega128RFA1 0x1E 0xA7 0x01 0xA701 0x1F
31.4 Calibration Byte
The ATmega128RFA1 has a byte calibration value for the internal RC Oscillator. This
byte resides in the high byte of address 0x000 in the signature address space. During
reset, this byte is automatically written into the OSCCAL Register to ensure correct
frequency of the calibrated RC Oscillator.
31.5 Page Size
Table 31-7. Number of Words in a Page and Number of Pages in the Flash
Flash Size Page Size PCWORD No. of
Pages
PCPAGE PCMSB
64k words (128k bytes) 128 words PC[6:0] 512 PC[15:7] 15
Table 31-8. Number of Bytes in a Page and Number of Pages in the EEPROM
EEPROM Size Page Size PCWORD No. of
Pages
PCPAGE EEAMSB
4k bytes 8 bytes EEA[2:0] 512 EEA[11:3] 11
31.6 Parallel Programming Parameters, Pin Mapping, and Commands
This section describes how to parallel program and verify Flash Program memory,
EEPROM Data memory, Memory Lock bits, and Fuse bits in the ATmega128RFA1.
31.6.1 Signal Names
In this section, some pins of the ATmega128RFA1 are referenced by signal names
describing their functionality during parallel programming; see
Figure 31-1 on page 468
and Table 31-9 on page 468. Pins not described in this table are referenced by their
default pin names.
The XA1/XA0 pins determine the action executed when the CLKI pin is given a positive
pulse. The bit coding is shown in
Table 31-12 on page 469.
When pulsing WR
___
or OE
__
or, the command loaded determines the action executed. The
different commands are shown in Table 31-13 on page 469.