AT89LP428-20AU Atmel, AT89LP428-20AU Datasheet - Page 126

• Manufacturer Part Number: AT89LP428-20AU
• Description: MCU 8051 4K FLASH SPI 32TQFP
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP428-20AU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 30
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Processor Series: AT89x
• Core: 8051
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89ISP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

23.9.6
126
AT89LP428/828
Timing Parameters
The timing parameters for
are shown in
Table 23-8.
Note:
Symbol
t
t
PWRUP
PWRDN
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CLCL
t
SHSL
SLSH
t
t
t
AWR
POR
t
t
SOH
SOE
RLZ
RHZ
SCK
SOV
SOX
SSE
SSD
ZSS
SSZ
ERS
STL
SIS
SIH
WR
SR
SF
1. t
SCK
Table
Programming Interface Timing Parameters
is independent of t
Parameter
System Clock Cycle Time
Power On to SS High Time
Power-on Reset Time
SS Tristate to Power Off
RST Low to I/O Tristate
RST Low Settling Time
RST High to SS Tristate
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
SCK Setup to SS Low
SCK Hold after SS High
Write Cycle Time
Write Cycle with Auto-Erase Time
Chip Erase Cycle Time
23-8.
Figure
CLCL
23-5,
.
Figure
23-6,
Figure
200
t
t
t
Min
100
SLSH
SLSH
CLCL
2.5
7.5
10
75
50
10
10
25
25
23-7,
0
0
5
(1)
Figure
2 t
2 t
Max
23-8, and
100
60
25
25
10
35
10
25
CLCL
CLCL
1
3654A–MICRO–8/09
Figure 23-10
Units
ms
ms
ms
ns
µs
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns