參數(shù)資料
型號(hào): PSD9532V90MIT
廠商: 意法半導(dǎo)體
英文描述: Flash In-System Programmable ISP Peripherals For 8-bit MCUs
中文描述: Flash在系統(tǒng)可編程ISP的外設(shè)的8位微控制器
文件頁(yè)數(shù): 55/110頁(yè)
文件大?。?/td> 1737K
代理商: PSD9532V90MIT
55/110
PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2
Address In Mode
nals, 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.
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.
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 set-
ting Bit 7 of the VM Register to a ’1.’ Figure
27
shows how Port A acts as a bi-directional buffer for
the MCU data bus if Peripheral I/O Mode is en-
abled. 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 27. Peripheral I/O Mode
RD
PSEL0
PSEL1
PSEL
VM REGISTER BIT 7
WR
PA0-PA7
D0-D7
DATA BUS
AI02886
相關(guān)PDF資料
PDF描述
PSD9532V90MT Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD953312MT Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD953315JIT Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD953315JT Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD953315MIT Flash In-System Programmable ISP Peripherals For 8-bit MCUs
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