Z8F012ASB020SG Zilog, Z8F012ASB020SG Datasheet - Page 126

• Manufacturer Part Number: Z8F012ASB020SG
• Description: IC ENCORE XP MCU FLASH 1K 8SOIC
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F012ASB020SG

• 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: 6
• Program Memory Size: 1KB (1K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 16 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-SOIC (3.9mm Width)
• Processor Series: Z8F012Ax
• Core: eZ8
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 2
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: Z8F04A08100KITG, Z8F04A28100KITG, ZENETSC0100ZACG, ZENETSC0100ZACG, ZUSBOPTSC01ZACG, ZUSBSC00100ZAC, ZUSBSC00100ZACG
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit, 4 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-4039; Z8F012ASB020SG

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