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參數(shù)資料
| 型號： | PIC18F8622T-I/PT |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PIC MCU FLASH 32KX16 80-TQFP |
| 產(chǎn)品培訓(xùn)模塊： | Asynchronous Stimulus PIC18 J Series MCU Overview 8-bit PIC® Microcontroller Portfolio |
| 標(biāo)準包裝： | 1,200 |
| 系列： | PIC® 18F |
| 核心處理器： | PIC |
| 芯體尺寸： | 8-位 |
| 速度： | 40MHz |
| 連通性： | EBI/EMI，I²C，SPI，UART/USART |
| 外圍設(shè)備： | 欠壓檢測/復(fù)位，HLVD，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 70 |
| 程序存儲器容量： | 64KB（32K x 16） |
| 程序存儲器類型： | 閃存 |
| EEPROM 大?。?/td> | 1K x 8 |
| RAM 容量： | 3.8K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 4.2 V ~ 5.5 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 16x10b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 80-TQFP |
| 包裝： | 帶卷 (TR) |
| 產(chǎn)品目錄頁面： | 644 (CN2011-ZH PDF) |
| 配用： | XLT80PT3-ND - SOCKET TRAN ICE 80MQFP/TQFP AC164320-ND - MODULE SKT MPLAB PM3 80TQFP AC174011-ND - MODULE SKT PROMATEII 80TQFP |
| 其它名稱： | PIC18F8622T-I/PT-ND PIC18F8622T-I/PTTR |
2006 Microchip Technology Inc.
DS80253B-page 5
PIC18F6527/6622/8527/8622
17. Module: MSSP (I2C Mode)
It has been observed that, following a Power-on
Reset, I2C mode may not initialize properly by just
configuring the SCLx and SDAx pins as either
inputs or outputs. This has only been seen in a few
unique system environments.
A test of a statistically significant sample of pre-
production systems, across the voltage and
current range of the application's power supply,
should indicate if a system is susceptible to this
issue.
Work around
Before configuring the module for I2C operation:
1. Configure the SCLx and SDAx pins as outputs
by clearing their corresponding TRIS bits.
2. Force SCLx and SDAx low by clearing the
corresponding LAT bits.
3. While keeping the LAT bits clear, configure
SCLx and SDAx as inputs by setting their TRIS
bits.
Once this is done, use the SSPxCON1 and
SSPxCON2 registers to configure the proper I2C
mode as before.
Date Codes that pertain to this issue:
All engineering and production devices.
18. Module: MSSP (I2C Mode)
In I2C Master mode, the RCEN bit is set by soft-
ware to begin data reception, and cleared by the
peripheral after a byte is received. After a byte is
received, the device may take up to 80 TCY to clear
RCEN and 800 TCY during emulation.
Work around
Single byte receptions are typically not affected,
since the delay between byte receptions typically
is long enough for the RCEN bit to clear. For mul-
tiple byte receptions, the software must wait until
the bit is cleared by the peripheral before the next
byte can be received.
Date Codes that pertain to this issue:
All engineering and production devices.
19. Module: ECCP (PWM Mode)
When
the
PWM
auto-shutdown
feature
is
configured for automatic restart by setting the
PxRSEN bit (ECCPxDEL<7>), the pulse may ter-
minate immediately in a shutdown event. In addi-
tion, the pulse may restart within the period if the
shutdown condition expires. This may result in the
generation of short pulses on the PWM output(s).
Work around
Configure the auto-shutdown for software restart
by clearing the PxRSEN bit. The PWM can be re-
enabled
by
clearing
the
ECCPxASE
bit
(ECCPxAS<7>) after the shutdown condition
expires.
Date Codes that pertain to this issue:
All engineering and production devices.
20. Module: ECCP (PWM Mode)
When configured for half-bridge operation with
dead band (CCPxCON<7:6> = 10), the PWM out-
put may be corrupted for certain values of the
PWM duty cycle. This can occur when these
additional criteria are also met:
a non-zero, dead-band delay is specified
(PxDC6:PxDC0 > 0); and
the duty cycle has a value of 0 through 3, or
4n + 3 (n
≥ 1).
Work around
None.
Date Codes that pertain to this issue:
All engineering and production devices.
21. Module: CCP (PWM Mode)
Timer4 is not available as a clock source for either
CCP4
or
CCP5
in
any
PWM
mode
(CCPxCON<3:2> = 11). Selecting Timer4 as the
module’s clock source may cause the PWM output
to stop generating pulses.
Work around
To use CCP4 or CCP5 in PWM mode, use only
Timer2 as the clock source (T3CON<6,3> = 00).
Date Codes that pertain to this issue:
All engineering and production devices.
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