ML610Q409-NNNTBZ03A7 Rohm Semiconductor, ML610Q409-NNNTBZ03A7 Datasheet - Page 206

• Manufacturer Part Number: ML610Q409-NNNTBZ03A7
• Description: MCU 8BIT 16K FLASH 4CH 100-TQFP
• Manufacturer: Rohm Semiconductor
• Series: -r

Specifications of ML610Q409-NNNTBZ03A7

• Core Processor: nX-U8/100
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SSP, UART/USART
• Peripherals: LCD, Melody Driver, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.25 V ~ 3.6 V
• Data Converters: A/D 2x16b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 70°C
• Package / Case: 100-TFQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ML610Q407/ML610Q408/ML610Q409 User's Manual
Chapter 13 UART
13.3.2 Baud rate
Baud rates are generated by the baud generator.
The baud rate generator generates a baud rate by counting the clock selected by the baud rate clock selection bits
(U0CK1, U0CK0) of the UART0 mode register 0 (UA0MOD0). The count value of the baud rate generator can be set
by writing it in the UART0 baud rate register H or L (UA0BRTH, UA0BRTL). The maximum count is 4096.
The setting values of UA0BRTH and UA0BRTL are expressed by the following equation.
Table 13-2 lists the count values for typical baud rates.
Note:
When using 65.536KHz (LSCLK X 2) for the baud rate generator input clock, enable the operation of the low-speed
double clock by setting bit 2 (ENMLT) of the frequency control register 1 (FCON1) to “1”.
When the baud rate clock generator input clock selection is set to 500kHz or 2MHz, an error of 500kHz±25% or
2MHz±25% may occur. To set the baud rate with accuracy, set the baud rate generator counter value by referring to
the frequency measurement modes for Timers 2 and 3 (Sections 9.3.3).
Internal logic voltage (V
500kHz oscillation is selected. V
Ensure to write this bit when the high-speed clock oscillator circuit stops oscillating (During FCON1 register's
ENOSC bit is "0").
Baud rate
19200bps
38400bps
1200bps
2400bps
4800bps
9600bps
UA0BRTH, L＝
32.768kHz
32.768kHz
65.536kHz
32.768kHz
65.536kHz
65.536kHz
Baud rate
500kHz
500kHz
2MHz
2MHz
2MHz
2MHz
Clock
Baud rate generator
Clock selection
DDL
Table 13-2 Count Values for Typical Baud Rates
) is changed by OSCM2 bit. V
U0CK1 U0CK0
Clock frequency (Hz)
0
0
0
0
0
1
0
1
1
1
Baud rate (bps)
DDL
becomes Typ.1.5V when OSCM2 is set to “1” and 2MHz oscillation is selected. .
＊
＊
＊
＊
0
0
1
0
1
1
Count
value
104
417
208
104
27
14
27
14
52
52
7
7
13-12
—１
Approximately 824us
Approximately 427us
Approximately 412us
Approximately 214us
Approximately 214us
Approximately 208us
Approximately 107us
Approximately 104us
Approximately 104us
Approximately 52us
Approximately 26us
DDL
Baud rate generator counter value
Approximately
becomes Typ.1.2V when OSCM2 is set to “0” and
Period of
208.5us
one bit
UA0BRTH
00H
00H
00H
00H
00H
00H
01H
00H
00H
00H
00H
00H
UA0BRTL
CFH
1AH
0DH
1AH
0DH
A0H
06H
67H
06H
33H
67H
33H
Error
-2.5
-2.5
-2.5
-0.1
-2.5
[%]
1.1
1.1
0.2
0.2
0.2
0.2
0.2