HD64F7051SFJ20V Renesas Electronics America, HD64F7051SFJ20V Datasheet - Page 361

• Manufacturer Part Number: HD64F7051SFJ20V
• Description: MCU 5V 256K J-TEMP PB-FREE QFP-1
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7050r

Specifications of HD64F7051SFJ20V

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, WDT
• Number Of I /o: 102
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 168-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Contention between DCNT Write and Counter Clearing by Underflow: With the channel 10
down-counters (DCNT10A to DCNT10H), if the count is halted due to underflow occurring in the
T2 state of a down-counter write cycle by the CPU, retention of the H'0000 value has priority and
the write to DCNT by the CPU is not performed. Writing of 1 to the interrupt status flag (OSF)
when the underflow occurs is performed in the same way as for normal underflow.
The timing in this case is shown in figure 10.63. In this example, a write of H'5555 to DCNT is
attempted at the same time as DCNT underflows.
Internal write signal
Interrupt status flag
DCNT input clock
Underflow signal
Figure 10.63 Contention between DCNT Write and Underflow
Write data
Address
DCNT
(OSF)
CK
0001
DCNT address
T1
0000
5555
T2
H'0000 retained when DCNT halts
Rev. 5.00 Jan 06, 2006 page 339 of 818
Section 10 Advanced Timer Unit (ATU)
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REJ09B0273-0500