IS89C51 Datasheet, PDF (45/48 Pages) Integrated Silicon Solution, Inc – CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 4-Kbytes of FLASH

IS89C51
SERIAL PORT TIMING: SHIFT REGISTER MODE
Symbol
tXLXL
tQVXH
tXHQX
tXHDX
tXHDV
Parameter
Serial port clock cycle time
Output data setup to
clock rising edge
Output data hold after
clock rising edge
Input data hold after
clock rising edge
Clock rising edge to
input data valid
24 MHz
Clock
Min Max
490 510
406 —
73 —
0—
— 417
40 MHz
Clock
Min Max
290 310
240 —
40 —
0—
— 250
ISSI ^®
Variable Oscillator
(3.5-40 MHz)
Min
Max
12tCLCL–10
12tCLCL+10
10tCLCL–10
—
Unit
ns
ns
2tCLCL–10
—
ns
0
—
ns
—
10tCLCL
ns
EXTERNAL CLOCK DRIVE CHARACTERISTICS
Symbol
1/tCLCL
tCHCX
tCLCX
tCLCH
tCHCL
Parameter
Oscillator Frequency
High time
Low time
Rise time
Fall time
Min
Max
Unit
3.5
40
MHz
10
—
ns
10
—
ns
—
10
ns
—
10
ns
Integrated Silicon Solution, Inc. — 1-800-379-4774
45
MC016-1C
11/21/98