參數(shù)資料
型號: PSD854F2A-90MT
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 256K X 8 FLASH, 27 I/O, PIA-GENERAL PURPOSE, PQFP52
封裝: ROHS COMPLIANT, PLASTIC, QFP-52
文件頁數(shù): 98/128頁
文件大小: 1045K
代理商: PSD854F2A-90MT
PSD8XXFX
I/O ports
Doc ID 7833 Rev 7
16.6
Address In mode
For MCUs that have more than 16 address signals, the higher addresses can be connected
to port A, B, C, and D. The address input can be latched in the input macrocell (IMC) by
Address Strobe (ALE/AS, PD0). Any input that is included in the DPLD equations for the
SRAM, or primary or secondary Flash memory is considered to be an address input.
16.7
Data port mode
Port A can be used as a data bus port for a MCU with a non-multiplexed address/data bus.
The Data port is connected to the data bus of the MCU. The general I/O functions are
disabled in port A if the port is configured as a Data port.
16.8
Peripheral I/O mode
Peripheral I/O mode can be used to interface with external peripherals. In this mode, all of
port A serves as a tri-state, bi-directional data buffer for the MCU. Peripheral I/O mode is
enabled by setting Bit 7 of the VM register to a ’1.’ Figure 26 shows how port A acts as a bi-
directional buffer for the MCU data bus if Peripheral I/O mode is enabled. An equation for
PSEL0 and/or PSEL1 must be written in PSDabel. The buffer is tri-stated when PSEL0 or
PSEL1 is not active.
Figure 26.
Peripheral I/O mode
16.9
JTAG in-system programming (ISP)
Port C is JTAG compliant, and can be used for in-system programming (ISP). You can
multiplex JTAG operations with other functions on port C because in-system programming
(ISP) is not performed in normal operating mode. For more information on the JTAG port,
RD
PSEL0
PSEL1
PSEL
VM REGISTER BIT 7
WR
PA0 - PA7
D0-D7
DATA BUS
AI02886
相關PDF資料
PDF描述
PSD854F2A-90UT 256K X 8 FLASH, 27 I/O, PIA-GENERAL PURPOSE, PQFP64
PSH665-FREQ-OUT1 VCXO, SINE OUTPUT, 465 MHz - 865 MHz
PSM3-022K 1 ELEMENT, 0.022 uH, GENERAL PURPOSE INDUCTOR, SMD
PSM3-068K 1 ELEMENT, 0.068 uH, GENERAL PURPOSE INDUCTOR, SMD
PSM3-120K 1 ELEMENT, 0.12 uH, GENERAL PURPOSE INDUCTOR, SMD
相關代理商/技術參數(shù)
參數(shù)描述
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PSD854F2V-12MI 功能描述:CPLD - 復雜可編程邏輯器件 3.0V 2M 120ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
PSD854F2V-90J 功能描述:CPLD - 復雜可編程邏輯器件 3.0V 2M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
PSD854F2V-90M 功能描述:CPLD - 復雜可編程邏輯器件 3.0V 2M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
PSD-8M-01 制造商:Richco 功能描述:CB SPT REST MNT NAT 8MM SPC