DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 534

• Manufacturer Part Number: DF71251AD50FPV
• Description: MCU RISC FLASH 32K 8K 64LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Tinyr

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: -

14.5.4
Even when the count-up occurs in the T2 cycle while writing to CMCNT in bytes, the byte-writing
has priority over the count-up. In this case, the count-up is not performed. The byte data on
another side, which is not written to, is also not counted and the previous contents remain.
Figure 14.7 shows the timing when the count-up occurs in the T2 cycle while writing to CMCNT
in bytes.
14.5.5
Do not set the same value in CMCNT and CMCOR while CMCNT is not counting. If set, the
CMF bit in CMCSR is set to 1 and CMCNT is cleared to H'0000.
Rev. 5.00 Mar. 06, 2009 Page 514 of 770
REJ09B0243-0500
Figure 14.7 Conflict between Byte-Write and Count-Up Processes of CMCNT
Conflict between Byte-Write and Count-Up Processes of CMCNT
Compare Match between CMCNT and CMCOR
Peripheral operating
CMCNT count-up
Internal write
clock (Pφ)
CMCNTH
CMCNTL
Address
enable
CMCSR write cycle
N
X
T1
CMCNTH
T2
M (CMCNT write data)
X