ATTINY13-20PJ Atmel, ATTINY13-20PJ Datasheet - Page 98

• Manufacturer Part Number: ATTINY13-20PJ
• Description: IC MCU AVR 1K 5V 20MHZ 8DIP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY13-20PJ

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 6
• Program Memory Size: 1KB (512 x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -
• Other names: ATTINY13-24PJ; ATTINY13-24PJ

16.3
16.4
98
Performing a Page Write
Addressing the Flash During Self-Programming
ATtiny13
If the EEPROM is written in the middle of an SPM Page Load operation, all data loaded will be
lost.
To execute Page Write, set up the address in the Z-pointer, write “00000101” to SPMCSR and
execute SPM within four clock cycles after writing SPMCSR. The data in R1 and R0 is ignored.
The page address must be written to PCPAGE. Other bits in the Z-pointer must be written to
zero during this operation.
Note:
The Z-pointer is used to address the SPM commands.
Since the Flash is organized in pages (see
be treated as having two different sections. One section, consisting of the least significant bits, is
addressing the words within a page, while the most significant bits are addressing the pages.
This is shown in
addressed independently. Therefore it is of major importance that the software addresses the
same page in both the Page Erase and Page Write operation.
Figure 16-1. Addressing the Flash During SPM
Note:
Bit
ZH (R31)
ZL (R30)
Z - REGISTER
The CPU is halted during the Page Write operation.
PROGRAM MEMORY
1. The variables used in
BIT
PAGE
PROGRAM
COUNTER
15
Z15
Z7
15
7
Figure
PAGE ADDRESS
WITHIN THE FLASH
ZPCMSB
PCMSB
Z14
14
Z6
16-1. Note that the Page Erase and Page Write operations are
6
PCPAGE
Figure 16-1
Z13
Z5
13
5
ZPAGEMSB
PAGEMSB
are listed in
PCWORD
Table 17-5 on page
Z12
12
Z4
4
WORD ADDRESS
WITHIN A PAGE
(1)
1
Table 17-5 on page
Z11
Z3
0
0
11
3
INSTRUCTION WORD
PAGE
Z10
10
Z2
2
104), the Program Counter can
104.
Z9
Z1
9
1
PCWORD[PAGEMSB:0]:
00
01
02
PAGEEND
Z8
Z0
8
0
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