W78L801A24LL Nuvoton Technology Corporation of America, W78L801A24LL Datasheet - Page 17

• Manufacturer Part Number: W78L801A24LL
• Description: IC MCU 8-BIT 4K ROM 48-LQFP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W78r

Specifications of W78L801A24LL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: EBI/EMI
• Peripherals: LED, WDT
• Number Of I /o: 36
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: Mask ROM
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Program Fetch Cycle
Notes:
Data Read Cycle
Notes:
Data Write Cycle
Note: “ ∆ ” (due to buffer driving delay and wire loading) is 20 nS.
ALE Low to RD Low
Data Hold from RD High
Data Float from RD High
Address Valid to ALE Low
Address Hold from ALE Low
ALE Low to
Data Hold after PSEN High
Data Float after PSEN High
ALE Pulse Width
RD Low to Data Valid
RD Pulse Width
ALE Low to WR Low
Data Valid to WR Low
Data Hold from WR High
PSEN
PSEN Pulse Width
WR Pulse Width
1. P0.0 − P0.7, P2.0 − P2.7 remain stable throughout entire memory cycle.
2. Memory access time is 3 T
3. Data have been latched internally prior to PSEN going high.
4. “∆ ” (due to buffer driving delay and wire loading) is 20 nS.
1. Data memory access time is 8 T
2. “ ∆ ” (due to buffer driving delay and wire loading) is 20 nS.
Low to Data Valid
PARAMETER
PARAMETER
PARAMETER
PSEN
Low
CP
.
CP
.
SYMBOL
SYMBOL
SYMBOL
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
DWD
DWR
DAW
DAD
PSW
PDH
ALW
AAS
AAH
PDA
PDZ
APL
DDH
DRD
DAR
DDA
DDZ
- 17 -
3 T
6 T
1 T
1 T
1 T
2 T
3 T
3 T
1 T
1 T
6 T
MIN.
MIN.
CP
CP
MIN.
0
0
CP
CP
CP
CP
CP
-
0
0
-
CP
CP
CP
CP
- ∆
- ∆
- ∆
- ∆
- ∆
- ∆
- ∆
- ∆
- ∆
- ∆
- ∆
6 T
TYP.
2 T
3 T
TYP.
-
-
-
-
CP
-
-
-
-
Publication Release Date: June 04, 2006
-
-
CP
CP
6 T
TYP.
-
-
-
CP
3 T
2 T
1 T
1 T
MAX.
4 T
2 T
2 T
MAX.
CP
-
-
-
-
-
CP
CP
CP
-
CP
CP
CP
3 T
+ ∆
MAX.
CP
-
-
-
UNIT
+ ∆
nS
nS
nS
nS
nS
nS
nS
nS
UNIT
W78L801
nS
nS
nS
nS
nS
Revision A10
UNIT
NOTES
NOTES
nS
nS
nS
nS
1, 4
1, 2
4
4
2
3
4
4
1
2