P89C738ABB View Datasheet(PDF) - Philips Electronics
Part Name
Description
MFG CO.
'P89C738ABB' PDF : 64 Pages View PDF
Philips Semiconductors
8-bit Flash microcontrollers
Product specification
P89C738; P89C739
12 MHz
16 MHz
24 MHz
40 MHz VARIABLE CLOCK(1)
SYMBOL PARAMETER
UNIT
MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX. MIN.
MAX.
tQVWH
data set-up time 433 −
288 −
200 −
125 −
7tclk − 150 −
ns
before WR
tWHQX
data hold time 33 −
13 −
21 −
5−
tclk − 50 −
ns
after WR
tRLAZ
address float − 0
−0
−0
−0
−
0
ns
delay after RD
Note
1. The operating frequency is limited to: 3.5 MHz ≤ fclk ≤ 40 MHz.
Table 35 External clock drive XTAL1
SYMBOL
fclk
tCLCL
tCHCX
tCLCX
tCLCH
tCHCL
tCY
PARAMETER
clock frequency
clock period
high time
low time
rise time
fall time
cycle time (tCY = 12tclk)
VARIABLE CLOCK
MIN.
3.5
63
20
20
−
−
0.75
MAX.
40
833
tclk − tCLCX
tclk − tCHCX
20
20
10
UNIT
MHz
ns
ns
ns
ns
ns
µs
handbook, full pagewidth
t CHCX
V IH1
0.8 V
VIH1
0.8 V
t CLCH
t CHCL
t CLCX
VIH1
0.8 V
VIH1
0.8 V
t CLCL
MLA856
Fig.29 External clock drive XTAL1.
1998 Apr 07
54
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