Intel 83C51FA Serial Port Timing-Shift Register Mode, Shift Register Mode Timing Waveforms, Units

AUTOMOTIVE 80C51FA/83C51FA

SERIAL PORT TIMING-SHIFT REGISTER MODE

Test Conditions: TA e b40§C to a125§C; VCC e 5V g10%; VSS e 0V; Load Capacitance e 80 pF

Symbol	Parameter	12 MHz Oscillator		Variable Oscillator		Units
		Min	Max	Min	Max
TXLXL	Serial Port Clock Cycle Time	1		12TCLCL		ms
TQVXH	Output Data Setup to Clock	700		10TCLCLb133		ns
	Rising Edge
TXHQX	Output Data Hold after	50		2TCLCLb117		ns
	Clock Rising Edge
TXHDX	Input Data Hold After Clock	0		0		ns
	Rising Edge
TXHDV	Clock Rising Edge to Input		700		10TCLCLb133	ns
	Data Valid

SHIFT REGISTER MODE TIMING WAVEFORMS

				270501 ±15
EXTERNAL CLOCK DRIVE
Symbol	Parameter	Min	Max	Units
1/T CLCL	Oscillator Frequency	3.5	16	MHz
TCHCX	High Time	20		ns
TCLCX	Low Time	20		ns
TCLCH	Rise Time		20	ns
TCHCL	Fall Time		20	ns

EXTERNAL CLOCK DRIVE WAVEFORM

270501 ±16

12