HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 224
HD6477021X20V
Manufacturer Part Number
HD6477021X20V
Description
MCU 5V 32K PB-FREE 100-TQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7020r
Datasheet
1.HD6417020SVX12IV.pdf
(511 pages)
Specifications of HD6477021X20V
Core Processor
SH-1
Core Size
32-Bit
Speed
20MHz
Connectivity
EBI/EMI, SCI
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
32KB (32K x 8)
Program Memory Type
OTP
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6477021X20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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9.3.6
The DMA transfer ending conditions vary for individual channels ending and all channels ending
together.
Individual Channel Ending Conditions: There are two ending conditions. A transfer ends when
the value of the channel's DMA transfer count register (TCR) is 0, or when the DE bit of the
channel's CHCR is cleared to 0.
•
•
Conditions for Ending All Channels Simultaneously: Transfers on all channels end when 1) the
NMIF (NMI flag) bit or AE (address error flag) bit is set to 1 in the DMAOR, or 2) when the
DME bit in the DMAOR is cleared to 0.
DREQ
DACK
cycle
Note:
When TCR is 0: When the TCR value becomes 0 and the corresponding channel’s DMA
transfer ends, the transfer end flag bit (TE) is set in the CHCR. If the IE (interrupt enable) bit
has been set, a DMAC interrupt (DEI) is requested to the CPU.
When DE of CHCR is 0: Software can halt a DMA transfer by clearing the DE bit in the
channel’s CHCR. The TE bit is not set when this happens.
Bus
CK
DMA Transfer Ending Conditions
Dual address DREQ level detection, DACK active low, DACK output in read cycle, 1 bus
cycle = 2 states.
CPU
Figure 9.24 DREQ Pin Sampling Timing in Burst Mode
CPU
DMAC(R)
DMAC(W)
DMAC(R)
DMAC(W)
RENESAS 205
CPU
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