HD64F7144F50V Renesas Electronics America, HD64F7144F50V Datasheet - Page 99
![IC SUPERH MCU FLASH 256K 112QFP](/photos/12/21/122194/hd64f7144f50v_sml.jpg)
HD64F7144F50V
Manufacturer Part Number
HD64F7144F50V
Description
IC SUPERH MCU FLASH 256K 112QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7144r
Specifications of HD64F7144F50V
Core Processor
SH-2
Core Size
32-Bit
Speed
50MHz
Connectivity
EBI/EMI, I²C, SCI
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
74
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
112-QFP
For Use With
HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)EDK7145 - DEV EVALUATION KIT SH7145
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Company:
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HD64F7144F50V
Manufacturer:
Renesas Electronics America
Quantity:
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Part Number:
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4.18
The SH-DSP repeat (loop) control function is a special utility for controlling repetition efficiently.
The SETRC instruction is executed to hold a repeat count in the repeat counter (RC, 12 bits) and
set an execution mode in which the repeat (loop) program is repeated until the RC is 1. Upon
completion of the repeat operation, the content of the RC becomes 0.
The repeat start register (RS) holds the start address of the repeated section. The repeat end
register (RE) holds the ending address of the repeated section. (There are some exceptions. See
4.19.1 Notes.) The repeat counter (RC) holds the repeat count. The procedure for executing repeat
control is shown below:
1. Set the repeat start address in the RS register.
2. Set the repeat end address in the RE register.
3. Set the repeat count in the RC counter.
4. Execute the repeated program (loop).
The following instructions are used for executing 1 and 2:
The SETRC instruction is used to execute 3 and 4. Immediate data or a general register may be
used to specify the repeat count as the operand of the SETRC instruction:
#imm is 8 bits and the RC counter is 12 bits, so to set the RC counter to a value of 256 or greater,
use the Rm register. A sample program is shown below.
LDRS @(disp,PC);
LDRE @(disp,PC);
SETRC #imm;
SETRC Rm;
; instr1~5 executes repeatedly
RptStart: instrl;
DSP Repeat (Loop) Control
LDRS
LDRE
SETRC #imm;
instr0;
instr2;
instr3;
instr4;
#imm
Rm
RptStart;
RptEnd;
Rc, enable repeat control
Rc, enable repeat control
RC=#imm
Rev. 5.00 Jun 30, 2004 page 83 of 512
Section 4 Instruction Features
REJ09B0171-0500O
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