ATTINY48PRE Datasheet, PDF (216/298 Pages) ATMEL Corporation – 123 Powerful Instructions – Most Single Clock Cycle Execution

Table 21-9. Parallel Programming Characteristics, T_A = 25°C, V_CC = 5V (Continued)
Symbol
Parameter
Min
Typ
Max
Units
t_WLRH
WR Low to RDY/BSY High⁽¹⁾
3.7
t_{WLRH_CE}
WR Low to RDY/BSY High for Chip Erase⁽²⁾
7.5
4.5
ms
9
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.
21.11 Serial Programming Characteristics
Figure 21-9. Serial Programming Timing
MOSI
t_OVSH
SCK
MISO
t_SHSL
Figure 21-10. Serial Programming Waveforms
SERIAL DATA INPUT
(MOSI)
MSB
SERIAL DATA OUTPUT
(MISO)
MSB
SERIAL CLOCK INPUT
(SCK)
SAMPLE
t_SHOX
t_SLSH
t_SLIV
LSB
LSB
216 ATtiny48/88
8008F–AVR–06/10