N80C251SQ16 Intel, N80C251SQ16 Datasheet - Page 30

• 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

30
8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
T
T
T
T
T
T
CLYV
CLYX
Symbol
RLYV
RLYX
WLYV
WLYX
WAIT#
WCLK
ALE
WR#
P2
P0
Wait Clock Low to Wait Set-up
Wait Hold after Wait Clock Low
PSEN#/RD# Low to Wait Set-up
Wait Hold after PSEN#/RD# Low
WR# Low to Wait Set-up
Wait Hold after WR# Low
A8-A15
Figure 16. External Bus Cycle: Data Write (Page Mode)
State 1
T
T
WLYX
WLYX
Parameter
T
WLYV
max
min
Table 13. Real-time Wait AC Timing
State 2
A0-A7
T
CLYV
D0-D7
T
CLYX
WR# stretched
(2W)T
(2W)T
(2W)T
State 3
min
Min
0
0
0
T
OSC
OSC
OSC
CLYX
+ 5
+ 5
+ 5
max
(1+2W)T
(1+2W)T
(1+2W)T
stretched
stretched
PRELIMINARY
T
T
T
OSC
OSC
OSC
State 4
Max
– 20
– 20
– 20
OSC
OSC
OSC
– 20
– 20
– 20
A5003-01
Units
ns
ns
ns
ns
ns
ns