参数资料
型号: KSZ8864RMN
厂商: Micrel Inc
文件页数: 9/111页
文件大小: 0K
描述: IC ETHERNET SW 4PORT 64QFN
标准包装: 348
控制器类型: 以太网开关控制器
接口: MII,RMII
电源电压: 1.8V,2.5V,3.3V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 64-VFQFN 裸露焊盘
供应商设备封装: 64-QFN(8x8)
包装: 托盘
配用: 576-3869-ND - BOARD EVALUATION FOR KSZ8864RMN
其它名称: 576-3787
KSZ8864RMN-ND
PIC16C9XX
DS30444E - page 106
1997 Microchip Technology Inc.
14.3
Reset
The PIC16CXX differentiates between various kinds of
reset:
Power-on Reset (POR)
MCLR Reset during normal operation
MCLR Reset during SLEEP
WDT Reset (normal operation)
Some registers are not affected in any reset condition;
their status is unknown on POR and unchanged in any
other reset. Most other registers are reset to a “reset
state” on Power-on Reset (POR), on the MCLR and
WDT Reset, and on MCLR Reset during SLEEP. They
are not affected by a WDT Wake-up, which is viewed as
the resumption of normal operation. The TO and PD
bits are set or cleared differently in different reset situ-
ations as indicated in Table 14-4. These bits are used
in software to determine the nature of the reset. See
Table 14-6 for a full description of reset states of all reg-
isters.
A simplied block diagram of the on-chip reset circuit is
shown in Figure 14-7.
The devices all have a MCLR noise lter in the MCLR
reset path. The lter will detect and ignore small pulses.
It should be noted that a WDT Reset does not drive
MCLR pin low.
FIGURE 14-7: SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
S
R
Q
External
Reset
MCLR
VDD
OSC1
WDT
Module
VDD rise
detect
OST/PWRT
On-chip
RC OSC
WDT
Time-out
Power-on Reset
OST
10-bit Ripple counter
PWRT
Chip_Reset
10-bit Ripple counter
Enable OST(2)
Enable PWRT(2)
SLEEP
Note
1: This is a separate oscillator from the RC oscillator of the CLKIN pin.
2: See Table 14-3 for time-out situations.
(1)
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