Rainbow Electronics ATmega128RFA1 - Manual (Page 468)

468
8266A-MCU Wireless-12/09
ATmega128RFA1
Figure 31-1. Parallel Programming
(1)
Note: 1. Unused Pins should be left floating.
Table 31-9. Pin Name Mapping
Signal Name in
Programming Mode Pin Name I/O Function
RDY/BSY
___
PD1 O
0: Device is busy programming, 1: Device is
ready for new command.
OE
__
PD2 I Output Enable (Active low).
WR
___
PD3 I Write Pulse (Active low).
BS1 PD4 I Byte Select 1.
XA0 PD5 I XTAL Action Bit 0.
XA1 PD6 I XTAL Action Bit 1.
PAGEL PD7 I
Program Memory and EEPROM data Page
Load.
BS2 PE2 I Byte Select 2.
DATA PB7-0 I/O
Bi-directional Data bus (Output when OE ¯ ¯ ¯ is
low).
Table 31-10. BS2 and BS1 Encoding
BS2 BS1
Flash / EEPROM
Address
Flash Data
Loading / Reading
Fuse
Programming
Reading Fuse
and Lock Bits
0 0 Low Byte Low Byte Low Byte Fuse Low Byte
0 1 High Byte High Byte High Byte Lock Bits
1 0
Extended High
Byte
Reserved Extended Byte
Extended Fuse
Byte
1 1 Reserved Reserved Reserved Fuse High Byte