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MAQ17501LSXXX PDF预览

MAQ17501LSXXX

更新时间: 2023-04-15 00:00:00
品牌 Logo 应用领域
加拿大卓联 - ZARLINK /
页数 文件大小 规格书
36页 937K
描述
Micro Peripheral IC

MAQ17501LSXXX 数据手册

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MA17501  
Figure 1: MAS281 Chip Set with Optional MA17504 and Support RAMs  
As shown in Figure 1, the MAS281 is the minimum  
2.0 ARCHITECTURE  
processor configuration consisting of an Execution Unit, a  
Control Unit, and an Interrupt Unit. This configuration is  
capable of accessing a 64K-word address space. Addition of a  
MA31751 allows access to a 1M-word address space and/or  
provides hardware support for 1K-word memory block write  
protection.  
The EU, as with all components of the MAS281 chip set, is  
fabricated with GEC Plessey Semiconductors CMOS/SOS  
process technology. lnput and output buffers associated with  
signals external to the MAS281 are TTL compatible.  
Detailed descriptions of the EU's companion chips are  
provided in separate data sheets. Additional discussions on  
chip set system considerations, interconnection details, and  
DAlS mix benchmarking analysis are provided in separate  
applications notes.  
The Execution Unit consists of a full function 16-bit ALU,  
32-bit barrel shifter, 4 x 24-bit parallel multiplier, 24 x 16bit  
dual-port RAM register file, processor status word register,  
three operand transfer registers, three instruction fetch  
registers, various interconnect buses, synchronization clock  
generation logic, and microcode decode logic. Details of these  
components are depicted in Figure 2 and are discussed below:  
2.1 ALU  
The ALU is a full function 16-bit arithmetic/logic unit  
capable of performing arithmetic and logic operations on either  
one or two 16-bit operands in a single machine cycle. ln  
addition to operand manipulation, the ALU is used to compute  
memory addresses.  
The ALU supports 16-bit fixed-point single-precision, 32-bit  
fixed-point double-precision, 32-bit floating-point, and 48-bit  
floating-point extended-precision data in two’s complement  
representation. Double-precision and extended-precision  
operands are passed through the ALU 16 bits at a time on  
consecutive machine cycles. Machine flags provide an  
indication of ALU results and are used to set condition status  
(CS) bits C, P, Z, and N in the Status Word Register. Condition  
status bits and the Status Word register are discussed below.  
2

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