R5F61665N50FPV Renesas Electronics America, R5F61665N50FPV Datasheet - Page 396

• Manufacturer Part Number: R5F61665N50FPV
• Description: MCU FLASH 512K ROM 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of R5F61665N50FPV

• Core Processor: H8SX
• Core Size: 16/32-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, SmartCard, USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 92
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 9 Bus Controller (BSC)
9.15.2
This LSI has a write data buffer function for the peripheral module access. Using the write data
buffer function enables peripheral module writes and on-chip memory or external access to be
executed in parallel. The write data buffer function is made available by setting the PWDBE bit in
BCR2 to 1. For details on the on-chip peripheral module registers, see table 9.34, Number of
Access Cycles for Registers of On-Chip Peripheral Modules in section 9.14, Internal Bus.
Figure 9.105 shows an example of the timing when the write data buffer function is used. When
this function is used, if an internal I/O register write continues for two cycles or longer and then
there is an on-chip RAM, an on-chip ROM, or an external access, internal I/O register write only
is performed in the first two cycles. However, from the next cycle onward an internal memory or
an external access and internal I/O register write are executed in parallel rather than waiting until
it ends.
Rev. 2.00 Oct. 21, 2009 Page 362 of 1454
REJ09B0498-0200
Write Data Buffer Function for Peripheral Modules
Figure 9.105 Example of Timing when Peripheral Module
Iφ
Internal
address bus
Pφ
Internal I/O
address bus
Internal I/O
data bus
Write Data Buffer Function is Used
Peripheral module write
Peripheral module address
On-chip
memory
read