R5F52108ADFF datasheet(33/92 Pages) RENESAS

33 / 92 page

R01DS0041EJ0050 Rev.0.50

Page 33 of 90

Apr 15, 2011

RX210 Group

2. CPU

Under development Preliminary document

Specifications in this document are tentative and subject to change.

2.2.2.6

Backup PSW (BPSW)

The backup PSW (BPSW) is provided to speed up response to interrupts.

After a fast interrupt has been generated, the contents of the processor status word (PSW) are saved in the BPSW. The

allocation of bits in the BPSW corresponds to that in the PSW.

2.2.2.7

Fast Interrupt Vector Register (FINTV)

The fast interrupt vector register (FINTV) is provided to speed up response to interrupts.

The FINTV register specifies a branch destination address when a fast interrupt has been generated.

2.2.3

2.2.3.1

Accumulator (ACC)

The accumulator (ACC) is a 64-bit register used for DSP instructions. The accumulator is also used for the multiply and

multiply-and-accumulate instructions; EMUL, EMULU, MUL, and RMPA, in which case the prior value in the

accumulator is modified by execution of the instruction.

Use the MVTACHI and MVTACLO instructions for writing to the accumulator. The MVTACHI and MVTACLO

instructions write data to the higher-order 32 bits (bits 63 to 32) and the lower-order 32 bits (bits 31 to 0), respectively.

Use the MVFACHI and MVFACMI instructions for reading data from the accumulator. The MVFACHI and MVFACMI

instructions read data from the higher-order 32 bits (bits 63 to 32) and the middle 32 bits (bits 47 to 16), respectively.

b31

Value after reset:

Undefined

b31

Value after reset:

Undefined

Range for reading by MVFACMI

b63

b48 b47

b32

b31

b16 b15

Range for reading and writing by

MVTACHI and MVFACHI

Range for writing by MVTACLO

Value after reset:

Undefined

R5F52108ADFF Datasheet(PDF) 33 Page - Renesas Technology Corp

R5F52108ADFF Datasheet(HTML) 33 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92

Datasheet Download

Link URL