DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 531
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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14.4
14.4.1
The CMT has channels and each of them to which a different vector address is allocated has
compare match interrupt. When both the interrupt request flag (CMF) and interrupt enable bit
(CMIE) are set to 1, the corresponding interrupt request is output. When the interrupt is used to
activate a CPU interrupt, the priority of channels can be changed by the interrupt controller
settings. For details, see section 6, Interrupt Controller (INTC).
14.4.2
When CMCOR and CMCNT match, a compare match signal is generated and the CMF bit in
CMCSR is set to 1. The compare match signal is generated in the last cycle in which the values
match (when the CMCNT value is updated to H'0000). That is, after a match between CMCOR
and CMCNT, the compare match signal is not generated until the next CMCNT counter clock
input. Figure 14.4 shows the timing of CMF bit setting.
14.4.3
The CMF bit in CMCSR is cleared by reading 1 from this bit, then writing 0.
Interrupts
CMT Interrupt Sources
Timing of Setting Compare Match Flag
Timing of Clearing Compare Match Flag
Peripheral operating
Compare match
Counter clock
clock (Pφ)
CMCOR
CMCNT
signal
Figure 14.4 Timing of CMF Setting
(N + 1)th
N
N
clock
Rev. 5.00 Mar. 06, 2009 Page 511 of 770
0
REJ09B0243-0500
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