N80C251SQ16 Intel, N80C251SQ16 Datasheet - Page 28

• Manufacturer Part Number: N80C251SQ16
• Description: IC MPU 8-BIT 5V 16MHZ 44-PLCC
• Manufacturer: Intel
• Series: 80Cr

Specifications of N80C251SQ16

• Rohs Status: RoHS non-compliant
• Core Processor: MCS 251
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SIO
• Peripherals: PWM, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: 804459

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8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
5.3.3
5.3.4
RD#/PSEN#
DEFINITION OF REAL-TIME WAIT SYMBOLS
EXTERNAL BUS CYCLES, REAL-TIME WAIT STATES
WAIT#
WCLK
ALE
Figure 13. External Bus Cycle: Code Fetch/Data Read (Nonpage Mode)
P0
P2
Table 12. Real-time Wait Timing Symbol Definitions
A
D
C
Y
W
R
A0-A7
State 1
T
T
RLYX
Signals
RLYX
Address
Data
WCLK
WAIT#
WR#
RD#/PSEN#
T
RLYV
max
min
A8-A15
State 2
D0-D7
T
CLYV
L
X
V
Conditions
Low
Hold
Setup
T
CLYX
RD#/PSEN#
stretched
stretched
State 3
min
T
CLYX
max
PRELIMINARY
stretched
State 1 (next cycle)
A0-A7
A8-A15
A5000-01