attiny15l ATMEL Corporation, attiny15l Datasheet - Page 59

• Manufacturer Part Number: attiny15l
• Description: Attiny15l 8-bit Microcontroller With 1k Byte Flash
• Manufacturer: ATMEL Corporation

High-voltage Serial
Programming
Characteristics
Low-voltage Serial
Downloading
1187H–AVR–09/07
Figure 32. High-voltage Serial Programming Timing
Table 26. High-voltage Serial Programming Characteristics, T
V
Both the program and data memory arrays can be programmed using the SPI bus while
RESET is pulled to GND. The serial interface consists of pins SCK, MOSI (input) and
MISO (output). See Figure 33. After RESET is set low, the Programming Enable instruc-
tion needs to be executed first before program/erase instructions can be executed.
Figure 33. Serial Programming and Verify
For the EEPROM, an auto-erase cycle is provided within the self-timed write instruction
and there is no need to first execute the Chip Erase instruction. The Chip Erase instruc-
tion turns the content of every memory location in both the program and EEPROM
arrays into $FF.
The program and EEPROM memory arrays have separate address spaces: $0000 to
$01FF for Program memory and $000 to $03F for EEPROM memory.
Symbol
CC
SDI (PB0), SII (PB1)
t
t
t
t
t
SHOV
SHSL
SLSH
IVSH
SHIX
= 5.0V ± 10% (unless otherwise noted)
SDO (PB2)
Internal CK
SCI (PB3)
Parameter
SCI (PB3) Pulse Width High
SCI (PB3) Pulse Width Low
SDI (PB0), SII (PB1) Valid to SCI (PB3) High (8th
edge)
SDI (PB0), SII (PB1) Hold after SCI (PB3) High (8th
edge)
SCI (PB3) High (9th edge) to SDO (PB2) Valid
1
2
PB5 (RESET)
GND
t
ATtiny15/L
IVSH
7
VALID
8
VCC
PB2
PB1
PB0
9
2.7 - 5.5V
t
10
SHIX
t
SHOV
SCK
MISO
MOSI
t
SHSL
10.0
25.0
25.0
50.0
50.0
Min
15
16.0
Typ
ATtiny15L
16
A
t
SLSH
= 25°C ± 10%,
Max
32.0
Units
ns
ns
ns
ns
ns
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