Rainbow Electronics ATmega162V - Manual (Page 242)

242
ATmega162/V
2513E–AVR–09/03
Reading the Calibration Byte The algorithm for reading the calibration byte is as follows (refer to “Programming the
Flash” on page 236 for details on Command and Address loading):
1. A: Load Command “0000 1000”.
2. B: Load Address Low Byte, 0x00.
3. Set OE to “0”, and BS1 to “1”. The Calibration byte can now be read at DATA.
4. Set OE to “1”.
Parallel Programming
Characteristics Figure 102. Parallel Program ming Timing, Including some G eneral Timing
Requirements
Figu re 103 . P arallel P rogra mm ing Tim in g, L oadin g S equ enc e w ith T im ing
Requirements
(1)
Note: 1. The timing requirements shown in Figure 102 (i.e., t
DVXH
, t
XHXL
, and t
XLDX
) also apply
to loading operation.
Data & Contol
(DATA, XA0/1, BS1, BS2)
XTAL1
t
XHXL
t
WLWH
t
DVXH
t
XLDX
t
PLWL
t
WLRH
WR
RDY/BSY
PAGEL t
PHPL
t
PLBX
t
BVPH
t
XLWL
t
WLBX
t
BVWL
WLRL
XTAL1
PAGEL
t
PLXH XLXH
t
t
XLPH
ADDR0 (low byte) DATA (low byte) DATA (high byte) ADDR1 (low byte) DATA
BS1
XA0
XA1
LOAD ADDRESS
(LOW BYTE)
LOAD DATA
(LOW BYTE)
LOAD DATA
(HIGH BYTE)
LOAD DATA LOAD ADDRESS
(LOW BYTE)