W78E516B40DL Nuvoton Technology Corporation of America, W78E516B40DL Datasheet - Page 24

• Manufacturer Part Number: W78E516B40DL
• Description: IC MCU 8-BIT 64K FLASH 40-DIP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W78r

Specifications of W78E516B40DL

• Core Processor: 8052
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

7.3 A.C. 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
usually experience less than a ±20 nS variation. The numbers below represent the performance
expected from a 0.6 micron CMOS process when using 2 and 4 mA output buffers.
7.3.1 Clock Input Waveform
Notes:
7.3.2 Program Fetch Cycle
Notes:
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
Operating Speed
Clock Period
Clock High
Clock Low
1. The clock may be stopped indefinitely in either state.
2. The T
3. There are no duty cycle requirements on the XTAL1 input.
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. "Δ " (due to buffer driving delay and wire loading) is 20 nS.
Low to Data Valid
PARAMETER
PARAMETER
CP
PSEN
specification is used as a reference in other specifications.
Low
XTAL1
CP
.
SYMBOL
SYMBOL
T
T
T
T
T
T
T
T
Fop
T
Tch
Tcl
PSW
PDH
ALW
AAS
AAH
PDA
PDZ
APL
CP
T
CH
- 24 -
1 T
1 T
1 T
2 T
3 T
F
MIN.
MIN.
OP,
25
10
10
CP
CP
CP
CP
CP
0
0
0
-
-Δ
-Δ
-Δ
-Δ
-Δ
T
CP
T
2 T
3 T
CL
TYP.
TYP.
-
-
-
-
-
-
-
-
-
-
CP
CP
MAX.
2 T
1 T
1 T
MAX.
40
-
-
-
-
-
-
-
-
CP
CP
CP
CP
), and actual parts will
W78E516B
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