Rainbow Electronics ATmega128RFA1 - Manual (Page 477)

477
8266A-MCU Wireless-12/09
ATmega128RFA1
Table 31-14. Parallel Programming Characteristics, V
DEVDD
= 3.3V ± 10%
Symbol Parameter Min Typ Max Units
t
TSTRNH
Delay TST High before RSTN High 0 ns
t
DVXH
Data and Control Valid before CLKI High 67 ns
t
XLXH
CLKI Low to CLKI High 200 ns
t
XHXL
CLKI Pulse Width High 150 ns
t
XLDX
Data and Control Hold after CLKI Low 67 ns
t
XLWL
CLKI Low to WR
___
Low 0 ns
t
XLPH
CLKI Low to PAGEL high 0 ns
t
PLXH
PAGEL low to CLKI high 150 ns
t
BVPH
BS1 Valid before PAGEL High 67 ns
t
PHPL
PAGEL Pulse Width High 150 ns
t
PLBX
BS1 Hold after PAGEL Low 67 ns
t
WLBX
BS2/1 Hold after WR
___
Low 67 ns
t
PLWL
PAGEL Low to WR
___
Low 67 ns
t
BVWL
BS2/1 Valid to WR
___
Low 67 ns
t
WLWH
WR
___
Pulse Width Low 150 ns
t
WLRL
WR
___
Low to RDY/BSY
___
Low 0 1 µs
t
WLRH
WR
___
Low to RDY/BSY
___
High
(1)
3.7 4.5 ms
t
WLRH_CE
WR
___
Low to RDY/BSY
___
High for Chip Erase
(2)
12 14.5 ms
t
XLOL
CLKI Low to OE
__
Low 0 ns
t
BVDV
BS1 Valid to DATA valid 0 250 ns
t
OLDV
OE
__
Low to DATA Valid 250 ns
t
OHDZ
OE
__
High to DATA Tri-stated 250 ns
Notes: 1. t
WLRH
is valid for the Write Flash, Write EEPROM, Write Fuse bits and Write Lock
bits commands.
2. t
WLRH_CE
is valid for the Chip Erase command.
31.8 Serial Downloading
Both the Flash and EEPROM memory arrays can be programmed using a serial
programming bus while RSTN is pulled to DVSS. The serial programming interface
consists of pins SCK, PDI (input) and PDO (output). After RSTN is set low, the
Programming Enable instruction needs to be executed first before program/erase
operations can be executed. NOTE, in
Table 31-15 below , the pin mapping for serial
programming is listed.
31.8.1 Serial Programming Pin Mapping
Table 31-15. Pin Mapping Serial Programming
Symbol Pins I/O Description
PDI PB2 I Serial Data In
PDO PB3 O Serial Data Out
SCK PB1 I Serial Clock