HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 128

• Manufacturer Part Number: HD6417712BPV
• Description: MPU 1.5/3.3V 0K PB-FREE 256-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Ethernetr

Specifications of HD6417712BPV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, Ethernet, FIFO, SCI, SIO
• Peripherals: DMA, POR, WDT
• Number Of I /o: 24
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 3 DSP Operating Unit
• Example 7: Repeat loop consisting of two instructions (extended to the instruction stream
• Example 8: Repeat loop consisting of one instruction instructions (extended to the instruction
In the DSP mode, the system control instructions (LDC and STC) that handle the RS and RE
registers are extended. The RC[11:0] bits and RF[1:0] bits of the SR can be controlled by the LDC
and STC instructions for the SR register. These instructions should be used if an exception is
enabled during repeat loop execution. The repeat loop can be resumed correctly by storing the RS
and RE register values and RC[11:0] bits and RF[1:0] bits of the SR register before exception
handling and by restoring the stored values after exception handling. However, note that there are
some restrictions on exception acceptance during repeat loop execution. For details refer to
Restrictions on Repeat Loop Control in section 3.3.1, Repeat Control Instructions and section 4,
Exception Handling.
Table 3.6
Rev. 1.00 Dec. 27, 2005 Page 84 of 1044
REJ09B0269-0100
Instruction
STC RS, Rn
STC RE, Rn
STC.L RS, @-Rn
STC.L RE, @-Rn
LDC.L @Rn+, RS
LDC.L @Rn+, RE
LDC Rn,RS
LDC Rn, RE
RptStart: instr1
RptEnd:
RptStart:
RptEnd:
shown in example 3, above)
stream shown in example 4, above)
DSP Mode Extended System Control Instructions
REPEAT RptStart, RptEnd, #4
instr0
instr2
REPEAT RptStart, RptEnd, #4
instr0
instr1
Operation
RS→Rn
RE→Rn
Rn-4→Rn, RS→(Rn)
Rn-4→Rn, RE→(Rn)
(Rn)→RS, Rn+4→Rn
(Rn)→RE, Rn+4→Rn
Rn →RS
Rn→RE
;
; [Repeat start instruction]
; [Repeat end instruction]
;
; [Repeat start instruction] ==
[Repeat end instruction]
Number of
Execution States
1
1
1
1
4
4
4
4