UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 204

• Manufacturer Part Number: UPD78F0034BGC-8BS-A
• Description: MCU 8-Bit 78K0 CISC 32KB Flash 2.5V/3.3V/5V 64-Pin LQFP
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0034BGC-8BS-A

• Package: 64LQFP
• Family Name: 78K0
• Maximum Speed: 12 MHz
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 51
• Interface Type: 3-Wire/UART
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

202
CR01 capture value
CR00 capture value
(4) Pulse width measurement by means of restart
Note OVF0 must be cleared by software.
TM0 count value
When input of a valid edge to the TI00 pin is detected, the count value of 16-bit timer counter 0 (TM0) is taken
into 16-bit timer capture/compare register 01 (CR01), and then the pulse width of the signal input to the TI00
pin is measured by clearing TM0 and restarting the count (see register settings in Figure 8-22).
The edge specification can be selected from two types, rising or falling edges, by bits 4 and 5 (ES00 and ES01)
of prescaler mode register 0 (PRM0).
Sampling is performed at the interval selected by prescaler mode register 0 (PRM0) and a capture operation is
only performed when a valid level of the TI00 pin is detected twice, thus eliminating noise with a short pulse width.
Caution
TI00 pin input
Count clock
INTTM01
Figure 8-20. Timing of Pulse Width Measurement Operation with Free-Running Counter
OVF0
If the valid edge of TI00 is specified to be both the rising and falling edges, 16-bit timer capture/
compare register 00 (CR00) cannot perform the capture operation.
0000H
t
and Two Capture Registers (with Rising Edge Specified)
0001H
CHAPTER 8 16-BIT TIMER/EVENT COUNTER 0
D0
(D1
D0
User’s Manual U14046EJ5V0UD
D0 + 1
D0)
t
D1
D1
D1 + 1
(10000H
FFFFH
D1 + D2)
0000H
t
D2
(D3
D2 + 1
D2
Note
D2)
t
D3
D3