參數(shù)資料
型號： AT75C1010
英文描述： AT75C1010 Telephony Software Module [Updated 11/01. 29 Pages] This software module runs on the OakDSPCore subsystem of the AT75 series SIAP. expanding its capabilities and making the processor flexible and east to integrate into most operating systems.
中文描述： AT75C1010電話軟件模塊[更新11/01。 29頁]本軟件模塊上運行的AT75系列OakDSPCore子系統(tǒng)統(tǒng)計所。擴大其能力，使處理器的靈活和東部地區(qū)融入大多數(shù)操作系統(tǒng)。
文件頁數(shù)： 100/171頁
文件大小： 1288K
代理商： AT75C1010
34
AT75C DSP Subsystem
1368C–INTAP–08/02
Flags Notation
The effect of each instruction on the flags is described by the following table:
For flag definitions, refer to “Status Registers” on page 23.
Conventions
1.
The arithmetic operations are performed in 2’s complement.
2.
The post-modification of rN registers is supported with the following instructions:
– instructions that use an indirect addressing mode
– modr
– norm
– max, maxd, min (in r0 only)
In these instructions the contents of rN register are post-modified as follows:
– rN, rN + 1, rN - 1, rN + step
– Options controlled by configuration registers cfgX:
Step size: STEPI, STEPJ – 2’s complement 7 bits (-64 to 63)
Modulo size: MODI, MODJ – unsigned 9 bits (1 to 512)
– Options controlled by st2:
For each rN register, it should be defined if MODULO is enabled or disabled. In
order to use MODI or MODJ the relative Mn bit must be set (the only exception for
this is at modr instruction, when there is an optional field for disabling the modulo).
For more details on the modulo arithmetic unit, refer to “Modulo Modifier” on page
Whenever the operand field in the instruction includes the option of (rN), it means
that the rN can be post-modified in one of the four options.
Assembler syntax: (rN), (rN)+, (rN)-, (rN) + s
For example: mov(r0)-, r1
mac(r4)+, (r0) + s, a0
add(r2), al
modr(r5)-
3.
Direct addressing mode assembler syntax:
The syntax when a one-word instruction is used is either direct address or [direct
address].
4.
The MSP of the P register (ph) is a write-only register. The 32-bit P register is
updated after a multiply operation and can be read only by transferring it to the
ALU; that is, it can be moved into aX or be an operand for arithmetic and logic
operations. When transferring it into the ALU, it is sign-extended to 36 bits. This
enables the user to store and restore the P register.
5.
The P register is used as a source operand for different instructions: as one of
the REG registers; at moda instruction – pacr function; at multiply instructions
where the P register is added or subtracted from one of the accumulators. When
using the P register as a source operand, it always means using the “shifted P
register”. Shifted P register means that the P register is sign-extended into 36
bits and then shifted as defined at the PS field, status register st1. In shift right,
the sign is extended, whereas in shift left a zero is appended into the LSB. The
x
The flag is affected by the execution of the instruction.
–
The flag is not affected by the instruction.
1 or 0
The flag is unconditionally set or cleared by the instruction.
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