ML610Q412P-NNNTB03A7 Rohm Semiconductor, ML610Q412P-NNNTB03A7 Datasheet - Page 111

• Manufacturer Part Number: ML610Q412P-NNNTB03A7
• Description: MCU 8BIT 16K FLASH 120-TQFP
• Manufacturer: Rohm Semiconductor

Specifications of ML610Q412P-NNNTB03A7

• Core Processor: nX-U8/100
• Core Size: 8-Bit
• Speed: 625kHz
• Connectivity: I²C, SSP, UART/USART
• Peripherals: LCD, POR, PWM, WDT
• Number Of I /o: 14
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.1 V ~ 3.6 V
• Data Converters: A/D 2x12b, 2x24b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

7.3.3
Frequency adjustment (Adjustment range: Approx. −488ppm to +488ppm. Adjustment accuracy: Approx. 0.48ppm) is
possible for outputs of T8KHZ to T1HZ of LTBC by using the low-speed time base counter frequency adjust registers
(LTBADJH and LTBADJL).
Table7-1 shows correspondence between the frequency adjustment values (LTBADJH, LTBADJL) and adjustment
ratio.
The adjustment values (LADJ10 to LADJ0) to be set in LTBADJH and LTBADJL can be obtained by using the
following equations:
Note:
The low-speed clock (LSCLK) and the outputs of T32KHZ and T16KHZ of LTBC are not adjusted by the frequency
adjust function.
The frequency adjustment accuracy does not guarantee the accuracy including the frequency variation of the crystal
oscillation (32.768kHz) due to temperature variations.
The function can be utilized on ML610Q411 and ML610Q412 which has the low-speed crystal oscillation clock. It can
not be utilized on ML610Q415 because the ML610Q415 uses 1/16 of 500kHz RC oscillation clock (31.25kHz) for the
low-speed clock (LSCLK), as which frequency has significant temperature variation comparing to the crystal
oscillation.
0
0
0
0
0
0
1
1
1
1
:
:
Example 1: When adjusting +15.0ppm (gaining time)
Example 2: When adjusting −25.5ppm (losing time)
Adjustment value
Adjustment value
Adjustment value
1
1
0
0
0
0
1
1
0
0
:
:
Low-Speed Time Base Counter Frequency Adjustment Function
Table 7-1 Correspondence between Frequency Adjustment Values (LTBADJH, LTBADJL)
1
1
0
0
0
0
1
1
0
0
:
:
1
1
0
0
0
0
1
1
0
0
:
:
and Adjustment Ratio
= Frequency adjustment ratio × 2097152 (decimal)
= Frequency adjustment ratio × 200000h (hexadecimal)
= +15.0ppm × 2097152 (decimal)
= +15.0 × 10
= +31.45728 (decimal)
≅ 01Fh (hexadecimal)
= −25.5ppm × 2097152 (decimal)
= −25.5 × 10
= −53.477376 (decimal)
≅ 7CCh (hexadecimal)
1
1
0
0
0
0
1
1
0
0
:
:
LADJ10 to 0
1
1
0
0
0
0
1
1
0
0
:
:
1
1
0
0
0
0
1
1
0
0
:
:
−6
−6
× 2097152
× 2097152
0
1
0
0
1
1
0
0
0
1
:
:
1
1
0
0
0
0
1
1
0
0
:
:
7 – 9
ML610Q411/ML610Q412/ML610Q415 User’s Manual
1
1
1
1
0
0
1
1
0
0
:
:
1
0
1
0
1
0
1
0
1
0
:
:
Hexadecimal Frequency adjustment ratio (ppm)
3FFH
3FEH
7FFH
7FEH
003H
002H
001H
000H
401H
400H
:
:
Chapter 7 Time Base Counter
+487.80
+487.33
−487.80
−488.28
+1.43
+0.95
+0.48
−0.48
−0.95
0
:
: