HD6417020SVX12I Renesas Electronics America, HD6417020SVX12I Datasheet - Page 132
HD6417020SVX12I
Manufacturer Part Number
HD6417020SVX12I
Description
IC SUPERH MPU ROMLESS 100TQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7020r
Datasheet
1.HD6417020SVX12IV.pdf
(511 pages)
Specifications of HD6417020SVX12I
Core Processor
SH-1
Core Size
32-Bit
Speed
12.5MHz
Connectivity
EBI/EMI, SCI
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
32
Program Memory Type
ROMless
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
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8.2.9
The refresh time constant register (RTCOR) is a 16-bit read/write register that sets the compare
match cycle used with RTCNT. The values in RTCOR and RTCNT are constantly compared.
When they match, the compare-match flag (CMF) is set in RTCNT and RTCSR is cleared to
H'0000. If the bit RFSHE in RCR is set to 1 when this happens, a CAS before RAS (CBR) refresh
is performed. When the CMIE bit of the RTCSR is also set to 1, a compare match interrupt (CMI)
is generated.
Bits 15–8 are reserved bits and cannot be used to set the cycle. These bits always read as 0.
RTCOR is initialized to H'00FF by a power-on reset, but is not initialized by a manual reset or by
the standby mode.
To prevent RTCOR from being written incorrectly, it must be written by a different method from
most other registers. A word transfer operation is used, H'96 is written in the top byte and the
actual data is written in the lower byte. For details, see section 8.2.11, Note on Register Access.
8.2.10
The parity control register (PCR) is a 16-bit read/write register that selects the parity polarity and
space to be parity checked. PCR is initialized to H'0000 by a power-on reset, but is not initialized
by a manual reset or by the standby mode.
112 RENESAS
Initial value:
Initial value:
Bit name:
Bit name:
Refresh Time Constant Register (RTCOR)
Parity Control Register (PCR)
R/W:
R/W:
Bit:
Bit:
R/W
15
—
—
0
7
1
R/W
14
—
—
0
6
1
R/W
13
—
—
0
5
1
R/W
12
—
—
0
4
1
R/W
11
—
—
0
3
1
R/W
10
—
—
0
2
1
R/W
—
—
9
0
1
1
R/W
—
—
8
0
0
1
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