ZLF645S2864GP0001T Maxim Integrated, ZLF645S2864GP0001T Datasheet - Page 71
![no-image](/images/no-image-200.jpg)
ZLF645S2864GP0001T
Manufacturer Part Number
ZLF645S2864GP0001T
Description
8-bit Microcontrollers - MCU Crimzon Flash Infrared MCU
Manufacturer
Maxim Integrated
Datasheet
1.ZLF645E0H4864G2204.pdf
(201 pages)
Specifications of ZLF645S2864GP0001T
Core
Z8
Data Bus Width
8 bit
Maximum Clock Frequency
8 MHz
Program Memory Size
64 KB
Data Ram Size
1 KB
Operating Supply Voltage
2 V to 3.6 V
Interface Type
UART
Number Of Programmable I/os
5
Number Of Timers
2 x 8 bit, 1 x 16 bit
Processor Series
ZLF645
Program Memory Type
Flash
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19-4572; Rev 0; 4/09
•
The ICP baud rate for read operations is significantly higher than for programming
operations.
programmed in this case a higher Baud rate can be used. Considering the ZLF645’s sys-
tem clock is of high frequency to support higher ICP Baud rates. The Baud rate neces-
sary to support maximum programming efficiency is calculated as follows:
The
above for the
tiple bytes of data from sequential address locations within the Flash memory, every
byte read requires only 1 byte be received across the ICP interface. As described for the
Write Flash Memory
interface and the Flash Memory during memory reads. This means, as described for the
Write Flash Memory
can occur at is dependent upon how quickly the ZLF645 completes a Flash Memory
read operation, once it is initiated by the ICP. A ZLF645 memory read operation
requires two system clock cycles to complete. Considering a ZLF645 system clock
period of 250 ns, the theoretical maximum Baud rate reduces to the maximum Baud
rate supported by the devices system clock frequency, which is calculated as follows:
Max Baud Rate
Read Flash Memory
Max Baud Rate
Write Flash Memory
=
1
500 ns bit
=
, there is no buffering of data that takes place between the ICP
6 ICP byte 10 ICP bits/byte
command, the maximum Baud rate that memory read operations
command can be used in the same two ways as described
=
2 Mbaud
command. When using the command to read mul-
Flash Programming through the ICP Interface
65 µs/byte
ZLF645 Series Flash MCUs
=
922.8 kbaud
Product Specification
63
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