HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 199
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
-
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Part Number
Manufacturer
Quantity
Price
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Part Number:
HD6477021X20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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• Bit 0 (DMA enable bit (DE)): DE enables or disables DMA transfers. In the auto-request
Bit 0: DE
0
1
9.2.5
The DMA operation register (DMAOR) is a 16-bit read/write register that controls the DMA
transfer mode. It also indicates the DMA transfer status. It is initialized to H'0000 by a reset or the
standby mode.
Note: Write only 0 to clear the flag.
• Bits 15–10 (reserved): These bits always read 0. The write value should always be 0.
180 RENESAS
mode, the transfer starts when this bit or the DME bit of the DMAOR is set to 1. The TE bit
and the NMIF and AE bits of the DMAOR must be all cleared to 0. In external request mode
or on-chip peripheral module request mode, the transfer begins when the DMA transfer request
is received from said device or on-chip peripheral module, provided this bit and the DME bit
are set to 1. As with the auto request mode, the TE bit and the NMIF and AE bits of the
DMAOR must be all cleared to 0. The transfer can be stopped by clearing this bit to 0.
The DE bit is initialized to 0 by resets or in standby mode.
Initial value:
Initial value:
Bit name:
Bit name:
DMA Operation Register (DMAOR)
R/W:
R/W:
Bit:
Bit:
——
15
—
0
R
7
0
R
Description
DMA transfer disabled (initial value)
DMA transfer enabled
14
—
—
0
R
6
0
R
13
—
—
0
R
5
0
R
12
—
—
0
R
4
0
R
11
—
—
0
R
3
0
R
R/(W)*
AE
10
—
0
R
2
0
R/(W)*
NMIF
PR1
R/W
9
0
1
0
DME
PR0
R/W
8
0
0
0
R
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