DS89C420-ENG Maxim Integrated Products, DS89C420-ENG Datasheet - Page 5

• Manufacturer Part Number: DS89C420-ENG
• Description: IC MCU ULTRA 25MHZ HP 44-TQFP
• Manufacturer: Maxim Integrated Products
• Series: 89Cr

Specifications of DS89C420-ENG

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SIO, UART/USART
• Peripherals: Power-Fail Reset, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

PSEN Low to Valid
Instruction In
Input Instruction Hold After
PSEN
Input Instruction Float After
PSEN
Port 0 Address to Valid
Instruction In
Port 2 Address to Valid
Instruction In
PSEN Low to Port 0
Address Float
RD Pulse Width (P3.7)
(Note 2)
WR Pulse Width (P3.6)
(Note 2)
RD (P3.7) Low to Valid
Data In (Note 2)
Data Hold After RD (P3.7)
Data Float After RD (P3.7)
MOVX ALE Low to Input
Data Valid (Note 2)
Port 0 Address to Valid
Data In (Note 2)
PARAMETER
SYMBOL
t
t
t
t
t
t
t
t
t
t
AVDV0
t
t
t
WLWH
AVIV0
AVIV2
RLRH
RLDV
RHDX
RHDZ
PLAZ
LLDV
PLIV
PXIX
PXIZ
t
t
CLCL
CLCL
MIN
t
t
STC1
STC1
PAGE MODE 1
0
0
- 5 +
- 5 +
1 CYCLE
t
CLCL
t
t
CLCL
CLCL
MAX
t
STC1
- 15 +
- 18
- 18
t
t
CLCL
CLCL
MIN
t
t
STC1
STC1
PAGE MODE 1
0
0
- 5 +
- 5 +
2 CYCLE
t
CLCL
t
1.5t
CLCL
MAX
t
STC1
18
CLCL
- 15 +
- 18
5 of 47
-
2t
2t
CLCL
CLCL
MIN
t
t
STC1
STC1
PAGE MODE 1
0
0
- 5 +
- 5 +
4 CYCLE
2t
2t
2.5t
CLCL
CLCL
+ t
MAX
18
CLCL
STC1
- 18
- 15
-
2t
2t
CLCL
CLCL
MIN
t
t
STC1
STC1
PAGE MODE 2
0
0
- 5 +
- 5 +
DS89C420 Ultra-High-Speed Microcontroller
3t
2t
3t
20 + t
t
1.5t
2.5t
CLCL
t
t
CLCL
CLCL
CLCL
+ t
CLCL
CLCL
+ t
MAX
20
0
CLCL
STC1
CLCL
STC1
- 18
- 5
- 20
- 15
- 5
STC1
- 20
-
-
2t
2t
CLCL
CLCL
NON-PAGE MODE
MIN
t
t
STC1
STC1
0
0
- 5 +
- 5 +
2t
3t
2t
3t
20 + t
3.5t
2.5t
t
t
CLCL
CLCL
CLCL
CLCL
+ t
CLCL
CLCL
+ t
MAX
20
0
CLCL
STC1
CLCL
STC1
- 18
- 5
- 20
- 15
- 5
STC1
- 20
-
-
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns