P89V660_08 Datasheet, PDF (77/89 Pages) NXP Semiconductors – 8-bit 80C51 5 V low power 16 kB/32 kB/64 kB flash microcontroller with 512 B/1 kB/2 kB RAM, dual I2C-bus, SPI

NXP Semiconductors
Table 72. External clock drive
Symbol
Parameter
f_osc
T_cy(clk)
t_CHCX
t_CLCX
t_CLCH
t_CHCL
oscillator frequency
clock cycle time
clock HIGH time
clock LOW time
clock rise time
clock fall time
P89V660/662/664
80C51 with 512 B/1 kB/2 kB RAM, dual I²C-bus, SPI
Oscillator
40 MHz
Min
Max
-
-
25
-
8.75
-
8.75
-
-
10
-
10
Variable
Min
0
-
0.35T_cy(clk)
0.35T_cy(clk)
-
-
Max
40
-
0.65T_cy(clk)
0.65T_cy(clk)
-
-
Unit
MHz
ns
ns
ns
ns
ns
V_DD − 0.5 V
0.45 V
0.2V_DD + 0.9 V
0.2V_DD − 0.1 V
t_CHCL
t_CLCX
t_CHCX
t_CLCH
T_cy(clk)
Fig 39. External clock drive waveform
002aaa907
Table 73.
Symbol
T_XLXL
t_QVXH
t_XHQX
t_XHDX
t_XHDV
Serial port timing
Parameter
Oscillator
40 MHz
Min
Max
serial port clock cycle time
0.3
-
output data set-up to clock rising
117
-
edge time
output data hold after clock rising 0
-
edge time
input data hold after clock rising edge 0
-
time
input data valid to clock rising edge -
117
time
Variable
Min
Max
12T_cy(clk)
-
10T_cy(clk) − 133 -
2T_cy(clk) − 50
-
Unit
µs
ns
ns
0
-
ns
-
10T_cy(clk) − 133 ns
P89V660_662_664_2
Product data sheet
Rev. 02 — 29 January 2008
© NXP B.V. 2008. All rights reserved.
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