ATtiny2313 Atmel Corporation, ATtiny2313 Datasheet - Page 154

• Manufacturer Part Number: ATtiny2313
• Manufacturer: Atmel Corporation

Specifications of ATtiny2313

• Flash (kbytes): 2 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 4
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 18
• Ext Interrupts: 18
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.12
• Eeprom (bytes): 128
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

Addressing the
Flash During Self-
Programming
154
ATtiny2313
The Z-pointer is used to address the SPM commands.
Since the Flash is organized in pages (see
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
independently. Therefore it is of major importance that the software addresses the same page in
both the Page Erase and Page Write operation.
The LPM instruction uses the Z-pointer to store the address. Since this instruction addresses the
Flash byte-by-byte, also the LSB (bit Z0) of the Z-pointer is used.
Figure 68. Addressing the Flash During SPM
Note:
Bit
ZH (R31)
ZL (R30)
Z - REGISTER
1. The different variables used in
PROGRAM MEMORY
BIT
Z15
PAGE
15
Z7
PROGRAM
COUNTER
7
15
Figure
PAGE ADDRESS
WITHIN THE FLASH
Z14
ZPCMSB
68. Note that the Page Erase and Page Write operations are addressed
14
Z6
PCMSB
6
PCPAGE
Z13
13
Z5
5
Figure 68
Z12
12
Z4
4
ZPAGEMSB
PAGEMSB
Table 69 on page
PCWORD
(1)
WORD ADDRESS
WITHIN A PAGE
are listed in
Z11
11
Z3
3
1
0
0
INSTRUCTION WORD
Z10
10
Z2
2
Table 69 on page
PAGE
160), the Program Counter can be
Z9
Z1
9
1
Z8
Z0
8
0
160.
PCWORD[PAGEMSB:0]:
00
01
02
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