Z51F3220FNX Datasheet, PDF (40/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

7.12 UART0/1 Characteristics
Table 7-12 UART0/1 Characteristics
Parameter
Serial port clock cycle time
Output data setup to clock rising edge
Clock rising edge to input data valid
Output data hold after clock rising edge
Input data hold after clock rising edge
Serial port clock High, Low level width
t HIGH
Z51F3220
Product Specification
(TA= -40°C ~ +85°C, VDD= 1.8V ~ 5.5V, fXIN=11.1MHz)
Symbol
MIN
TYP
MAX Unit
tSCK
1250
tCPU x 16
1650
nS
tS1
590
tCPU x 13
–
nS
tS2
–
–
590
nS
tH1
tCPU - 50
tCPU
–
nS
tH2
0
–
–
nS
tHIGH, tLOW
470
tCPU x 8
970
nS
t LOW
t SCK
Figure 7.3 Waveform for UART0/1 Timing Characteristics
Shift Clock
Data Out
Data In
tSCK
tS 1
D0
tS2
Valid
tH1
D1
D2
tH2
Valid
Valid
D3
Valid
D4
Valid
D5
Valid
D6
Valid
D7
Valid
Figure 7.4 Timing Waveform for the UART0/1 Module
PS029902-0212
PRELIMINARY
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