W78L051C24PL Nuvoton Technology Corporation of America, W78L051C24PL Datasheet - Page 14

• Manufacturer Part Number: W78L051C24PL
• Description: IC MCU 8-BIT 4K FLASH 44-PLCC
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W78r

Specifications of W78L051C24PL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 36
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

10. AC CHARACTERISTICS
The AC specifications are a function of the particular process used to manufacture the part, the ratings
of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the specifications
can be expressed in terms of multiple input clock periods (T
experience less than a ±20 nS variation. The numbers below represent the performance expected
from a 0.6micron CMOS process when using 2 and 4 mA output buffers.
Clock Input Waveform
Notes:
1. The clock may be stopped indefinitely in either state.
2. The T
3. There are no duty cycle requirements on the XTAL1 input.
Program Fetch Cycle
Notes:
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
4. "Δ " (due to buffer driving delay and wire loading) is 20 nS.
Operating Speed
Clock Period
Clock High
Clock Low
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
PSEN
PSEN Pulse Width
CP
Low to Data Valid
PARAMETER
specification is used as a reference in other specifications.
PARAMETER
PSEN
Low
CP
.
XTAL1
SYMBOL
PSEN
F
T
T
T
SYMBOL
OP
CP
CH
CL
T
T
T
T
T
T
T
T
PSW
PDH
ALW
AAS
AAH
PDA
PDZ
APL
going high.
T
CH
- 14 -
MIN.
50
25
25
1 T
1 T
1 T
2 T
3 T
0
F
MIN.
OP,
CP
CP
CP
CP
CP
0
0
-
T
-Δ
-Δ
-Δ
-Δ
-Δ
CP
TYP.
T
W78LE51C/W78L051C
CL
-
-
-
-
2 T
3 T
TYP.
-
-
-
-
-
-
CP
CP
CP
), and actual parts will usually
MAX.
20
2 T
1 T
1 T
MAX.
-
-
-
-
-
-
-
-
CP
CP
CP
UNIT
MHz
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
NOTES
NOTES
1, 4
1
2
3
3
4
4
2
3
4
4