EZ80L92AZ020SC00TR Zilog, EZ80L92AZ020SC00TR Datasheet - Page 164
![IC EZ80 MPU 100LQFP](/photos/6/76/67664/269-100-lqfp_sml.jpg)
EZ80L92AZ020SC00TR
Manufacturer Part Number
EZ80L92AZ020SC00TR
Description
IC EZ80 MPU 100LQFP
Manufacturer
Zilog
Datasheet
1.EZ80L92AZ020SG.pdf
(231 pages)
Specifications of EZ80L92AZ020SC00TR
Processor Type
eZ80
Features
High Speed, Single-Cycle Instruction-Fetch
Speed
20MHz
Voltage
3.3V
Mounting Type
Surface Mount
Package / Case
100-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
EZ80L92AZ020SC00T
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Manufacturer
Quantity
Price
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PS013014-0107
The I
eZ80L92 system clock is f
f
In MASTER mode, the I
The use of two separately-programmable dividers allows the MASTER mode output fre-
quency to be set independently of the frequency at which the I
ture is particularly useful in multimaster systems because the frequency at which the I
bus is sampled must be at least 10 times the frequency of the fastest master on the bus to
ensure that START and STOP conditions are always detected. By using two programma-
ble clock divider stages, a high sampling frequency can be ensured while allowing the
MASTER mode output to be set to a lower frequency.
Bus Clock Speed
The I
To ensure correct detection of START and STOP conditions on the bus, the I
ple the I
bus. The sampling frequency should therefore be at least 1 MHz (4 MHz in FAST mode)
to guarantee correct operation with other bus masters.
The I
and the value in the I2C_CCR bits 2 to 0. The bus clock speed generated by the I
MASTER mode is determined by the frequency of the input clock and the values in
I2C_CCR[2:0] and I2C_CCR[6:3].
Bit
Position
[6:3]
M
[2:0]
N
f
f
SAMP
SAMP
SCL
2
2
2
=
C clocks are derived from the eZ80L92’s system clock. The frequency of the
C bus is defined for bus clock speeds up to 100 Kbps (400 Kbps in FAST mode).
C sampling frequency is determined by the frequency of the eZ80L92 system clock
supplied by:
2
=
C bus at least ten times faster than the bus clock speed of the fastest master on the
10 • (M + 1)(2)
f
SCLK
2
N
f
SCLK
0000–1111
000–111
N
Value
2
C clock output frequency on SCL (f
SCK
. The I
Description
I
I
2
2
2
C bus is sampled by the I
C clock divider scalar value.
C clock divider exponent.
SCL
2
C bus is sampled. This fea-
2
C block at the frequency
Product Specification
) is supplied by:
I
2
C Serial I/O Interface
2
C must sam-
2
C in
2
C
158
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