AT90LS2343 ATMEL [ATMEL Corporation], AT90LS2343 Datasheet - Page 42

• Manufacturer Part Number: AT90LS2343
• Description: 8-Bit Microcontroller with 2K Bytes of In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

High-voltage Serial Programming Characteristics
Low-voltage Serial
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42
AT90S/LS2323/2343
Figure 34. High-voltage Serial Programming Timing
Table 17. High-voltage Serial Programming Characteristics, T
5.0V ± 10% (unless otherwise noted)
Both the program and data memory arrays can be programmed using the serial SPI bus
while RESET is pulled to GND. The serial interface consists of pins SCK, MOSI (input)
and MISO (output) (see Figure 35). After RESET is set low, the Programming Enable
instruction needs to be executed first before program/erase instructions can be
executed.
Figure 35. Low-voltage Serial Programming and Verify
t
t
WLWH_CE
WLWH_PFB
Symbol
t
t
t
t
t
SHOV
SHSL
SLSH
IVSH
SHIX
SDI (PB0), SII (PB1)
Parameter
SCI (XTAL1/PB3) Pulse Width High
SCI (XTAL1/PB3) Pulse Width Low
SDI (PB0), SII (PB1) Valid to SCI (XTAL1/PB3)
High
SDI (PB0), SII (PB1) Hold after SCI (XTAL1/PB3)
High
SCI (XTAL1/PB3) High to SDO (PB2) Valid
Wait after Instr.3 for Chip Erase
Wait after Instr.3 for Write Fuse Bits
SCI (XTAL1/PB3)
SDO (PB2)
GND
RESET
GND
t
IVSH
AT90S/LS2323,
AT90S/LS2343
t
SHSL
t
VCC
PB2
PB1
PB0
SHOV
2.7 - 6.0V
t
SHIX
100.0
100.0
50.0
50.0
10.0
Min
5.0
1.0
SCK
MISO
MOSI
A
= 25 ° C ± 10%, V
16.0
10.0
Typ
1.5
t
SLSH
Max
32.0
15.0
1.8
1004D–09/01
Units
ms
ms
ns
ns
ns
ns
ns
CC
=