T80C251TB Ver la hoja de datos (PDF) - Intel

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T80C251TB

HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Intel 

8xC251TB/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER

WCLK

ALE

WR#

WAIT#

P2

P0

State 1

State 2

State 3

State 4

TWLYX max

TWLYX min

TWLYV

TCLYV

TCLYX min

TCLYX max

WR# stretched

A15:8

D7:0

A7:0

stretched

stretched

Figure 14. External Bus Cycle: Data Write (Page Mode)

A5003-02

Table 13. Real-Time Wait AC Timing

Symbol

Parameter

TCLYV

Wait Clock Low to Wait Set-up

TCLYX

Wait Hold after Wait Clock Low

TRLYV

PSEN#/RD# Low to Wait Set-up

TRLYVA

PSEN#/RD# Low to Wait Set-up

TRLYX

Wait Hold after PSEN#/RD# Low

TWLYV

WR# Low to Wait Set-up

TWLYVA

WR# Low to Wait Set-up

TWLYX

Wait Hold after WR# Low

NOTES:

1. W = 0, 1, 2 — is the number of real time wait states.

2. Device configured with the extended data float timing.

Min

0

(2W)TOSC + 5

0

0

(2W)TOSC + 5

0

0

(2W)TOSC + 5

Max

TOSC – 13

(1+2W)TOSC – 20

TOSC – 13

TOSC – 35

(1+2W)TOSC – 20

TOSC – 13

TOSC – 35

(1+2W)TOSC – 20

Units

ns

ns (1)

ns

ns (2)

ns (1)

ns

ns (2)

ns (1)

27

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