ZLF645S0Q2032G Maxim Integrated, ZLF645S0Q2032G Datasheet - Page 102
ZLF645S0Q2032G
Manufacturer Part Number
ZLF645S0Q2032G
Description
8-bit Microcontrollers - MCU Crimzon Flash Infrared MCU
Manufacturer
Maxim Integrated
Datasheet
1.ZLF645E0H4864G2204.pdf
(201 pages)
Specifications of ZLF645S0Q2032G
Core
Z8
Data Bus Width
8 bit
Maximum Clock Frequency
8 MHz
Program Memory Size
32 KB
Data Ram Size
1 KB
On-chip Adc
No
Operating Supply Voltage
2 V to 3.6 V
Package / Case
QFN-EP-20
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
On-chip Dac
No
Processor Series
ZLF645
Program Memory Type
Flash
Supply Voltage - Max
3.6 V
Supply Voltage - Min
2 V
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19-4572; Rev 0; 4/09
Follow the steps below to configure the BRG as a timer with interrupt on time-out:
1. Disable the UART by clearing the receive and transmit enable bits, UCTL[7:6] to 0.
2. Load the appropriate 8-bit count value into the UART Baud Rate Generator Constant
3. Enable the Baud Rate Generator timer function and associated interrupt by setting the
Table 42
frequencies.
Table 42. BCNST Register Settings Examples
Target UART Data
Rate (baud)
2400
4800
9600
19200
register. The count frequency is the system clock frequency (in Hz) divided by 16.
Baud Rate Generator bit (UCTL bit 0) in the UART Control register to 1. When
configured as an 8-bit timer, the count value, instead of the reload value, is read, and
the counter begins counting down from its initial programmed value. On timing out
(reaching a value of 1), if the time-out interrupt is enabled, an interrupt will be
produced. The counter will then reload its programmed start value and begin counting
down again.
lists a number of BCNST register settings at various baud rates and system clock
System Clock = 4 MHz,
Crystal Clock = 8 MHz
BCNST = 01101000
Actual baud rate = 2403
BCNST = 00110100
Actual baud rate = 4807
BCNST = 00011010
Actual baud rate = 9615
BCNST = 00001101
Actual baud rate = 19230
System Clock = 3 MHz,
Crystal Clock = 6 MHz
BCNST = 01001110
Actual baud rate = 2403
BCNST = 00100111
Actual baud rate = 4807
BCNST = 00010100
Actual baud rate = 9375
BCNST = 00001010
Actual baud rate = 18750
ZLF645 Series Flash MCUs
Product Specification
Operation
94
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