EZ80F920120MOD Zilog, EZ80F920120MOD Datasheet - Page 146

• Manufacturer Part Number: EZ80F920120MOD
• Description: MODULE EZ80F92 512K 20MHZ
• Manufacturer: Zilog

Specifications of EZ80F920120MOD

• Module/board Type: Development Module
• Processor Series: EZ80F92x
• Core: eZ80
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 1 MB
• Interface Type: Cable
• Maximum Clock Frequency: 20 MHz
• Operating Supply Voltage: 0 V to 3.3 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: LQFP
• Development Tools By Supplier: eZ80F920200ZCOG
• Minimum Operating Temperature: 0 C
• For Use With/related Products: eZ80F92
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3157; EZ80F920120MOD

Figure 30.SPI Timing
PS015308-0404
(CPHA bit = 0) Data Out
(CPHA bit = 1) Data Out
ENABLE (To Slave)
SCK (CPOL bit = 0)
SCK (CPOL bit = 1)
Sample Input
Sample Input
ated by the master, the SCK pin becomes an input on a slave device. The SPI contains an
internal divide-by-two clock divider. In MASTER mode, the SPI serial clock is one-half
the frequency of the clock signal created by the SPI’s Baud Rate Generator.
As demonstrated in Figure 30 and SPI Clock Phase and Clock Polarity Operation, four
possible timing relations may be chosen by using control bits CPOL and CPHA in the SPI
Control register. See the SPI Control Register (SPI_CTL) on page 139. Both the master
and slave must operate with the identical timing, clock polarity (CPOL), and clock phase
(CPHA). The master device always places data on the MOSI line a half-cycle before the
clock edge (SCK signal) so that the slave device latches the data.
Table 72. SPI Clock Phase and Clock Polarity Operation
CPHA
0
0
1
1
CPOL
MSB
0
1
0
1
MSB
1
6
P R E L I M I N A R Y
Transmit
Falling
Falling
Rising
Rising
Edge
6
SCK
2
Number of Cycles on the SCK Signal
5
5
3
4
Receive
Falling
Falling
Rising
Rising
4
Edge
4
SCK
3
3
5
2
State
SCK
High
High
Low
Low
Idle
2
6
Product Specification
1
Serial Peripheral Interface
1
7
eZ80F92/eZ80F93
LSB
Characters?
LSB
Between
SS High
8
Yes
Yes
No
No
134