ZLF645E0H2864G00TR Maxim Integrated, ZLF645E0H2864G00TR Datasheet - Page 182
ZLF645E0H2864G00TR
Manufacturer Part Number
ZLF645E0H2864G00TR
Description
8-bit Microcontrollers - MCU Crimzon Flash Infrared MCU
Manufacturer
Maxim Integrated
Datasheet
1.ZLF645E0H4864G2204.pdf
(201 pages)
Specifications of ZLF645E0H2864G00TR
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
Package / Case
SSOP-28
Mounting Style
SMD/SMT
Interface Type
UART
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
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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Table 85. User Option Byte 1 (OPT1)
19-4572; Rev 0; 4/09
Bit
Field
Erased State
Flash Address
Bit Position
[7:4]
[3]
[2]
[1]
Value
—
1
0
1
0
1
0
7
1
Description
Reserved
16BITSTK —16 bit Stack Pointer Addressiblity Enable
The ZLF645 is enabled for 8-bits of stack pointer addressiblity allowing usage
of Bank 0 only of the devices general-purpose RAM space as the CPU stack.
The ZLF645 is enabled for 16-bits of stack pointer addressiblity allowing usage
of all of the devices general-purpose RAM space as the CPU stack.
DIVBY1 —System Clock Divide By 1 Enable
If SMR register bit 0 is also programmed to 0, the system clock frequency is
equal to the external clock frequency input on the XTAL1 pin divided by 2.
If SMR register bit 0 is also programmed to 0, the system clock frequency is
equal to the external clock frequency input on the XTAL1 pin.
FLPROT1 —Flash Main Memory Lower Half Protect
The Flash main memory and all of Information Area Page 3 can be read,
written, and erased by both the Flash Byte Programming interface or through
the ICP interface as long as FLRWP is also 1.
Reads and Writes to the lower half of Flash main memory and writes and
erasures to Information Area Page 3, by the ICP or Flash Byte Programming
interfaces is disabled unless, with this bit 0, a main memory mass erase is
completed first. A main memory mass erase causes resetting of this bit value
in the Option Byte 1 shadow register to a 1 but does not effect the
corresponding Flash memory bit. Once the Option Byte 1 shadow register bit
is reset, the ICP or Flash Byte Programming interface is allowed full read,
write, and erase access to the Flash's main memory and to Page 3 of the
Information Area and can reset the corresponding Flash memory bit.
6
1
Reserved
—
Flash Memory Information Area address: FFH
Must be written 1.
5
1
4
1
16BITSTK DIVBY1 FLPROT1
3
1
ZLF645 Series Flash MCUs
1
2
Product Specification
1
1
FLRWP
Operation
0
1
174
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