N80C251SQ16 Intel, N80C251SQ16 Datasheet - Page 29

• 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

PRELIMINARY
RD#/PSEN#
WAIT#
WCLK
ALE
WR#
P0
WAIT#
P2
WCLK
ALE
P2
P0
8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
Figure 15. External Bus Cycle: Code Fetch/Data Read (Page Mode)
Figure 14. External Bus Cycle: Data Write (Nonpage Mode)
A0-A7
State 1
A8-A15
T
T
WLYX
WLYX
State 1
T
T
T
RLYX
RLYX
WLYV
max
min
T
RLYV
max
min
State 2
A8-A15
A0-A7
State 2
D0-D7
T
CLYV
T
D0-D7
CLYV
T
CLYX
WR# stretched
T
State 3
CLYX
min
RD#/PSEN#
stretched
stretched
State 3
T
min
CLYX
T
CLYX
max
max
stretched
stretched
stretched
State 1 (next cycle)
State 4
A8-A15
A0-A7
A5002-01
A5001-01
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