參數(shù)資料
型號: MC56F8157
廠商: Electronic Theatre Controls, Inc.
英文描述: 16-BIT HYBRID CONTROLLERS
中文描述: 16位混合控制器
文件頁數(shù): 40/172頁
文件大小: 2444K
代理商: MC56F8157
56F8357 Technical Data, Rev. 8.0
40
Freescale Semiconductor
Preliminary
3.2.3
The recommended method of connecting an external clock is given in
Figure 3-4
. The external clock
source is connected to XTAL and the EXTAL pin is grounded. When using an external clock source, set
the OCCS_COHL bit high as well.
External Clock Source
Figure 3-4 Connecting an External Clock Signal
3.3 Registers
When referring to the register definitions for the OCCS in the
56F8300 Peripheral User Manual
, use the
register definitions
without
the internal Relaxation Oscillator, since the 56F8357/56F8157 do NOT
contain this oscillator.
Part 4 Memory Map
4.1 Introduction
The 56F8357 and 56F8157 devices are 16-bit motor-control chips based on the 56800E core. These parts
use a Harvard-style architecture with two independent memory spaces for Data and Program. On-chip
RAM and Flash memory are used in both spaces.
This chapter provides memory maps for:
Program Address Space including the Interrupt Vector Table
Data Address Space including the EOnCE Memory and Peripheral Memory Maps
On-chip memory sizes for each device are summarized in
Table 4-1
.
Flash memories’ restrictions are
identified in the “Use Restrictions” column of
Table 4-1
.
XTAL
EXTAL
External
Clock
V
SS
Note: When using an external clocking source with
this configuration, the input “CLKMODE” should be
high and the COHL bit in the OSCTL register
should be set to 1.
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