SAFC161RI datasheet(38/60 Pages) SIEMENS

tên linh kiện	SAFC161RI

Giải thích chi tiết về linh kiện	16-Bit CMOS Single-Chip Microcontroller

PDF	60 Pages

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nhà sản xuất	SIEMENS [Siemens Semiconductor Group]

Trang chủ	http://www.siemens.com/

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38 / 60 page

Semiconductor Group

1998-05-01

C161RI

AC Characteristics

Definition of Internal Timing

The internal operation of the C161RI is controlled by the internal CPU clock

CPU. Both edges of the

CPU clock can trigger internal (e.g. pipeline) or external (e.g. bus cycles) operations.

The specification of the external timing (AC Characteristics) therefore depends on the time between

two consecutive edges of the CPU clock, called “TCL” (see figure below).

Figure 10

Generation Mechanisms for the CPU Clock

The CPU clock signal can be generated via different mechanisms. The duration of TCLs and their

variation (and also the derived external timing) depends on the used mechanism to generate

CPU.

This influence must be regarded when calculating the timings for the C161RI.

The used mechanism to generate the CPU clock is selected during reset via the logic levels on pins

P0.15-13 (P0H.7-5).

TCL TCL

fCPU

fXTAL

Direct Clock Drive

TCL

fCPU

fXTAL

Prescaler Operation

SAFC161RI bảng dữ liệu(PDF) 38 Page - Siemens Semiconductor Group