AT89S8253 Atmel Corporation, AT89S8253 Datasheet - Page 28

• Manufacturer Part Number: AT89S8253
• Manufacturer: Atmel Corporation

Specifications of AT89S8253

• Flash (kbytes): 12 Kbytes
• Max. Operating Frequency: 24 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Sram (kbytes): 0.25
• Eeprom (bytes): 2048
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 3
• Isp: SPI
• Watchdog: Yes

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AT89S8253
Table 14-5.
Figure 14-4. SPI Master Timing (CPHA = 0)
(CPOL = 0)
(CPOL = 1)
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CLCL
SCK
SHSL
SLSH
SR
SF
SIS
SIH
SOH
SOV
SOE
SOX
SSE
SSD
MISO
MOSI
SCK
SCK
SS
SPI Slave Characteristics
Parameter
Oscillator Period
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
Slave Enable Lead Time
Slave Disable Lag Time
t
t
SHSL
SLSH
t
SCK
t
t
SHSL
SLSH
t
SR
t
SOH
1.5 t
1.5 t
4 t
4t
CLCL
41.6
Min
CLCL
CLCL
10
10
CLCL
t
0
SOV
+50
- 25
- 25
t
SF
t
Max
SIS
25
35
25
10
10
25
t
SIH
3286P–MICRO–3/10
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns