AT89LP2052 Atmel Corporation, AT89LP2052 Datasheet - Page 77

• Manufacturer Part Number: AT89LP2052
• Manufacturer: Atmel Corporation

Specifications of AT89LP2052

• Flash (kbytes): 2 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 15
• Spi: 1
• Uart: 1
• Sram (kbytes): 0.25
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 2
• Isp: SPI
• Watchdog: Yes

23.5.6
Figure 23-27. ISP Command Sequence
Table 23-4.
3547J–MICRO–10/09
Symbol
t
t
t
t
t
t
t
t
t
t
t
SHSL
SLSH
t
t
WRC
t
SOH
SCK
t
SOV
SOE
SOX
SSE
SSD
ERS
SIS
SIH
SR
SF
MOSI
MISO
SCK
ISP Command Sequence
SS
Serial Programming Interface Parameters
Parameter
Serial Clock Cycle Time
Clock High Time
Clock Low Time
Rise Time
Fall Time
Serial Input Setup Time
Serial Input Hold Time
Serial Output Hold Time
Serial Output Valid Time
Output Enable Time
Output Disable Time
SS Enable Lead Time
SS Disable Lag Time
Wire Cycle Time
Erase Cycle Time
The ISP multi-byte command sequence is shown in
Preamble
• SS should be brought low before the first byte in a command is sent and brought back high
• Command bytes are issued serially on MOSI (P1.5).
• Data bytes are output serially on MISO (P1.6).
after the final byte in the command has been sent. The command is not complete until SS
returns high.
X
7
6 5 4 3 2 1
Opcode
X
0
7
6 5 4 3 2 1
Address High
X
Min
200
100
100
100
50
10
10
0
7
Figure
6 5 4 3 2 1
Address Low
AT89LP2052/LP4052
X
23-27.
Max
4.5
25
25
10
35
10
25
9
0
7
7
6 5 4 3 2 1
6 5 4 3 2 1
Data Out
Data In
Units
ms
ms
0
0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
77