R0K561622S000BE Renesas Electronics America, R0K561622S000BE Datasheet - Page 283

• Manufacturer Part Number: R0K561622S000BE
• Description: KIT STARTER FOR H8SX/1622
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K561622S000BE

• Contents: Board, Cables, CD, Debugger, Power Supply
• Silicon Manufacturer: Renesas
• Features: Coding And Debugging, E10A Emulator, RS232 Serial Connection
• Kit Contents: Board
• Silicon Family Name: H8SX/1622F
• Silicon Core Number: R5F61622N50LGV
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: H8SX/1622
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

8.13.2
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 8.26, Number of
Access Cycles for Registers of On-Chip Peripheral Modules in section 8.12, Internal Bus.
Figure 8.45 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.
Write Data Buffer Function for Peripheral Modules
Figure 8.45 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
Rev. 2.00 Sep. 16, 2009 Page 253 of 1036
Section 8 Bus Controller (BSC)
REJ09B0414-0200