參數(shù)資料
型號(hào)： PIC16F74T-I/ML
廠商： Microchip Technology
文件頁(yè)數(shù)： 57/104頁(yè)
文件大?。?/td> 0K
描述： IC MCU FLASH 4KX14 A/D 44QFN
標(biāo)準(zhǔn)包裝： 1,600
系列： PIC® 16F
核心處理器： PIC
芯體尺寸： 8-位
速度： 20MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 33
程序存儲(chǔ)器容量： 7KB（4K x 14）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 192 x 8
電壓 - 電源 (Vcc/Vdd)： 4 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x8b
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 44-VQFN 裸露焊盤(pán)
包裝： 帶卷 (TR)
Micrel, Inc.
KSZ8851-16MLLJ
March 2010
48
M9999-030210-1.0
Memory BIST Info Register (0x24 – 0x25): MBIR
This register indicates the build-in self test result for both TX and RX memories after power-up/reset.
Bit
Default Value
R/W
Description
15-13
0x0
RO
Reserved.
12
-
RO
TXMBF TX Memory BIST Test Finish
When set, it indicates the Memory Built In Self Test completion for the TX Memory.
11
-
RO
TXMBFA TX Memory BIST Test Fail
When set, it indicates the TX Memory Built In Self Test has failed.
10-8
-
RO
TXMBFC TX Memory BIST Test Fail Count
To indicate the TX Memory Built In Self Test failed count
7-5
-
RO
Reserved.
4
-
RO
RXMBF RX Memory Bist Finish
When set, it indicates the Memory Built In Self Test completion for the RX Memory.
3
-
RO
RXMBFA RX Memory Bist Fail
When set, it indicates the RX Memory Built In Self Test has failed.
2-0
-
RO
RXMBFC RX Memory BIST Test Fail Count
To indicate the RX Memory Built In Self Test failed count.
Global Reset Register (0x26 – 0x27): GRR
This register controls the global and QMU reset functions with information programmed by the CPU.
Bit
Default Value
R/W
Description
15-2
0x0000
RO
Reserved.
1
0
RW
QMU Module Soft Reset
1: Software reset is active to clear both TXQ and RXQ memories.
0: Software reset is inactive.
QMU software reset will flush out all TX/RX packet data inside the TXQ and RXQ
memories and reset all QMU registers to default value.
0
RW
Global Soft Reset
1: Software reset is active.
0: Software reset is inactive.
Global software reset will affect PHY, MAC, QMU, DMA, and the switch core, all
registers value are set to default value.
0x28 – 0x29: Reserved
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