DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 530
DF71251AD50FPV
Manufacturer Part Number
DF71251AD50FPV
Description
MCU RISC FLASH 32K 8K 64LQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH Tinyr
Datasheet
1.DF71243N50FPV.pdf
(794 pages)
Specifications of DF71251AD50FPV
Core Processor
SH-2
Core Size
32-Bit
Speed
50MHz
Connectivity
SCI
Peripherals
POR, PWM, WDT
Number Of I /o
37
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF71251AD50FPV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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14.3
14.3.1
When an internal clock is selected with bits CKS1 and CKS0 in CMCSR and the STR bit in
CMSTR is set to 1, CMCNT starts incrementing using the selected clock. When the values in
CMCNT and CMCOR match, CMCNT is cleared to H'0000 and the CMF flag in CMCSR is set
to 1. When the CMIE bit in CMCSR is set to 1, a compare match interrupt (CMI) is requested.
CMCNT then starts counting up again from H'0000.
Figure 14.2 shows the operation of the compare match counter.
14.3.2
One of four internal clocks (Pφ/8, Pφ/32, Pφ/128, and Pφ/512) obtained by dividing the Pφ clock
can be selected with bits CKS1 and CKS0 in CMCSR. Figure 14.3 shows the timing.
Rev. 5.00 Mar. 06, 2009 Page 510 of 770
REJ09B0243-0500
Peripheral operating
Count clock
clock (Pφ)
Operation
Interval Count Operation
CMCNT Count Timing
CMCNT
CMCOR
H'0000
CMCNT value
clock
Nth
Figure 14.2 Counter Operation
Figure 14.3 Count Timing
N
Counter cleared by compare
match with CMCOR
(N + 1)th
clock
Time
N + 1
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