UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 110

• Manufacturer Part Number: UPD78F9234MC-5A4-A
• Description: MCU 8BIT 8KB FLASH 30PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9234MC-5A4-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

108
CR010 capture value
CR000 capture value
Note The carry flag is set to 1. Ignore this setting.
(3) Pulse width measurement with free-running counter and two capture registers
TM00 count value
TI000 pin input
TI010 pin input
When 16-bit timer counter 00 (TM00) is operated in free-running mode, it is possible to measure the pulse
width of the signal input to the TI000 pin.
When the rising or falling edge specified by bits 4 and 5 (ES000 and ES010) of prescaler mode register 00
(PRM00) is input to the TI000 pin, the value of TM00 is taken into 16-bit timer capture/compare register 010
(CR010) and an interrupt request signal (INTTM010) is set.
Also, when the inverse edge to that of the capture operation is input into CR010, the value of TM00 is taken
into 16-bit timer capture/compare register 000 (CR000).
Sampling is performed using the count clock cycle selected by prescaler mode register 00 (PRM00), and a
capture operation is only performed when a valid level of the TI000 pin is detected twice, thus eliminating
noise with a short pulse width.
Caution The measurable pulse width in this operation example is up to 1 cycle of the timer counter.
Count clock
INTTM010
INTTM000
Figure 6-22. Timing of Pulse Width Measurement Operation with Free-Running Counter
0000H
t
(with Both Edges Specified)
0001H
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
D0
(D1
D0
User’s Manual U17446EJ5V0UD
D0 + 1
D0)
t
D1
D1
D1
D1 + 1
((D2 + 1)
(D2
FFFFH
D1)
D1)
0000H
t
Note
t
Note
D2
D2
D2 + 1 D2 + 2
(D3
D2 + 1
D2)
t
D3