Z8F042AHJ020SC00TR Zilog, Z8F042AHJ020SC00TR Datasheet - Page 126

• Manufacturer Part Number: Z8F042AHJ020SC00TR
• Description: IC ENCORE XP MCU FLASH 4K 28SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHJ020SC00TR

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IrDA, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 23
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Z8F042AHJ020SC00T

Table 70. UART Baud Rates
PS022825-0908
10.0 MHz System Clock
Acceptable
Rate (kHz)
1250.0
625.0
250.0
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
BRG Divisor
The UART data rate is calculated using the following equation:
For a given UART data rate, calculate the integer baud rate divisor value using the follow-
ing equation:
The baud rate error relative to the acceptable baud rate is calculated using the following
equation:
For reliable communication, the UART baud rate error must never exceed 5 percent.
Table 70
used crystal oscillator frequencies.
(Decimal)
1042
2083
N/A
130
260
521
16
33
65
11
UART Baud Rate (bits/s)
UART Baud Rate Divisor Value (BRG)
1
3
5
UART Baud Rate Error (%)
provides information on the data rate errors for popular baud rates and commonly
Actual Rate
208.33
625.0
125.0
(kHz)
56.8
39.1
18.9
9.62
4.81
2.40
1.20
0.60
0.30
N/A
-16.67
Error
-1.36
-0.03
-0.03
-0.03
0.00
8.51
1.73
0.16
0.16
0.16
N/A
(%)
0.2
=
----------------------------------------------------------------------------------------------- -
16
=
100
System Clock Frequency (Hz)
×
UART Baud Rate Divisor Value
5.5296 MHz System Clock
Acceptable
×
Rate (kHz)
⎛
⎝
1250.0
Actual Data Rate Desired Data Rate
--------------------------------------------------------------------------------------------------- -
625.0
250.0
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
=
Round
Universal Asynchronous Receiver/Transmitter
Desired Data Rate
BRG Divisor
⎛
⎝
System Clock Frequency (Hz)
------------------------------------------------------------------------------ -
(Decimal)
Z8 Encore! XP
16
1152
N/A
N/A
144
288
576
×
18
36
72
1
3
6
9
UART Data Rate (bits/s)
–
Product Specification
Actual Rate
(kHz)
345.6
115.2
®
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
N/A
N/A
F082A Series
⎞
⎠
38.24
Error
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
N/A
N/A
(%)
⎞
⎠
115