ML610Q428-NNNTBZ03A7 Rohm Semiconductor, ML610Q428-NNNTBZ03A7 Datasheet - Page 113

• Manufacturer Part Number: ML610Q428-NNNTBZ03A7
• Description: MCU 8BIT 48K FLASH 128-TQFP
• Manufacturer: Rohm Semiconductor

Specifications of ML610Q428-NNNTBZ03A7

• Core Processor: nX-U8/100
• Core Size: 8-Bit
• Speed: 4.2MHz
• Connectivity: I²C, SSP, UART/USART
• Peripherals: LCD, Melody Driver, POR, PWM, WDT
• Number Of I /o: 14
• Program Memory Size: 48KB (24K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.1 V ~ 3.6 V
• Data Converters: A/D 2x12b, 2x24b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 70°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.
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
1
1
0
0
0
0
1
1
0
0
:
:
1
1
0
0
0
0
1
1
0
0
:
:
7 – 9
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)
ML610Q428/ML610Q429 User’s Manual
3FEH
7FEH
3FFH
7FFH
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
:
: