ATA5771-PXQW Atmel, ATA5771-PXQW Datasheet - Page 162

• Manufacturer Part Number: ATA5771-PXQW
• Description: XMITTR UHF ASK/FSK 868MHZ 24VQFN
• Manufacturer: Atmel

Specifications of ATA5771-PXQW

• Frequency: 868MHz ~ 928MHz
• Modulation Or Protocol: UHF
• Power - Output: 8dBm
• Voltage - Supply: 2 V ~ 4 V
• Current - Transmitting: 9.8mA
• Data Interface: PCB, Surface Mount
• Memory Size: 4kB Flash, 256B EEPROM, 256B SRAM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN
• Processor Series: ATA5x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 4 KB
• Data Ram Size: 256 B
• Interface Type: SPI, USI
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Sensitivity: -
• Data Rate - Maximum: -
• Current - Receiving: -
• Lead Free Status / Rohs Status: Details

4.22.3
4.22.4
162
Atmel ATA5771/73/74
Performing a Page Write
Addressing the Flash During Self-Programming
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.
• The CPU is halted during the Page Write operation.
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
operations are addressed 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 4-72. Addressing the Flash During SPM
Note:
Bit
ZH (R31)
ZL (R30)
Z - REGISTER
The different variables used in
PROGRAM MEMORY
BIT
PAGE
PROGRAM
COUNTER
15
Z15
15
Z7
7
PAGE ADDRESS
WITHIN THE FLASH
ZPCMSB
PCMSB
Figure 4-73 on page
Z14
14
Z6
6
PCPAGE
Z13
13
Z5
5
Figure 4-72
ZPAGEMSB
PAGEMSB
Table 4-62 on page
PCWORD
Z12
12
Z4
4
169. Note that the Page Erase and Page Write
are listed in
WORD ADDRESS
WITHIN A PAGE
(1)
1
Z11
0
0
Z3
11
3
INSTRUCTION WORD
Table 4-62 on page 169
PAGE
Z10
Z2
10
2
169), the Program Counter can
Z9
Z1
9
1
PCWORD[PAGEMSB:0]:
00
01
02
PAGEEND
Z8
Z0
9137E–RKE–12/10
8
0
.