R5F61668MZN50FPV Renesas Electronics America, R5F61668MZN50FPV Datasheet - Page 387
R5F61668MZN50FPV
Manufacturer Part Number
R5F61668MZN50FPV
Description
MCU FLASH 1024K ROM 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8SX/1600r
Datasheet
1.R5F61668MZN50FPV.pdf
(1416 pages)
Specifications of R5F61668MZN50FPV
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
1MB (1M x 8)
Program Memory Type
FLASH
Ram Size
56K 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
-
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9.15
9.15.1
This LSI has a write data buffer function for the external data bus. Using the write data buffer
function enables internal accesses in parallel with external writes or DMAC single address
transfers. The write data buffer function is made available by setting the WDBE bit to 1 in BCR1.
Figure 9.104 shows an example of the timing when the write data buffer function is used. When
this function is used, if an external address space write or a DMAC single address transfer
continues for two cycles or longer, and there is an internal access next, an external write only is
executed in the first two cycles. However, from the next cycle onward, internal accesses (on-chip
memory or internal I/O register read/write) and the external address space write rather than
waiting until it ends are executed in parallel.
Write to
external
space
Figure 9.104 Example of Timing when Write Data Buffer Function is Used
Write Data Buffer Function
Write Data Buffer Function for External Data Bus
Iφ
Internal
address bus
Bφ
Address bus
CSn
LHWR, LLWR
D15 to D0
T
1
External write cycle
On-chip
memory 1
On-chip memory read
External address
T
Rev. 1.00 Jan. 29, 2010 Page 355 of 1380
2
memory 2
On-chip
Section 9 Bus Controller (BSC)
Peripheral module address
Peripheral module read
REJ09B0596-0100
T
3
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