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參數(shù)資料
| 型號： | T48C862x-Rf-TNQ |
| 廠商： | Atmel Corp. |
| 元件分類： | 4位微控制器 |
| 英文描述： | Microcontroller with UHF ASK/FSK Transmitter |
| 中文描述： | 微控制器，帶有超高頻ASK / FSK發(fā)射器 |
| 文件頁數(shù)： | 18/108頁 |
| 文件大?。?/td> | 1023K |
| 代理商： | T48C862X-RF-TNQ |
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18
T48C862-R4 [Preliminary]
4551C–4BMCU–01/04
ALU
The 4-bit ALU performs all the arithmetic, logical, shift and rotate operations with the top
two elements of the expression stack (TOS and TOS-1) and returns the result to the
TOS. The ALU operations affects the carry/borrow and branch flag in the condition code
register (CCR).
Figure 13.
ALU Zero-address Operations
I/O Bus
The I/O ports and the registers of the peripheral modules are I/O mapped. All communi-
cation between the core and the on-chip peripherals take place via the I/O bus and the
associated I/O control. With the microcontroller IN and OUT instructions, the I/O bus
allows a direct read or write access to one of the 16 primary I/O addresses. More about
the I/O access to the on-chip peripherals is described in the section“”Peripheral Mod-
ules”. The I/O bus is internal and is not accessible by the customer on the final
microcontroller device, but it is used as the interface for the microcontroller emulation
(see section “Emulation” on page 98).
Instruction Set
The microcontroller instruction set is optimized for the high level programming language
qFORTH. Many microcontroller instructions are qFORTH words. This enables the com-
piler to generate a fast and compact program code. The CPU has an instruction pipeline
allowing the controller to prefetch an instruction from EEPROM at the same time as the
present instruction is being executed. The microcontroller is a zero-address machine,
the instructions contain only the operation to be performed and no source or destination
address fields. The operations are implicitly performed on the data placed on the stack.
There are one- and two-byte instructions which are executed within 1 to 4 machine
cycles. A microcontroller machine cycle is made up of two system clock
cycles (SYSCL). Most of the instructions are only one byte long and are executed in a
single machine cycle. For more information refer to the “MARC4 Programmer’s Guide”.
Interrupt Structure
The microcontroller can handle interrupts with eight different priority levels. They can be
generated from the internal and external interrupt sources or by a software interrupt
from the CPU itself. Each interrupt level has a hard-wired priority and an associated vec-
tor for the service routine in the EEPROM (see Table 1 on page 20). The programmer
can postpone the processing of interrupts by resetting the interrupt enable flag (I) in the
CCR. An interrupt occurrence will still be registered, but the interrupt routine only started
after the I-flag is set. All interrupts can be masked, and the priority individually software
configured by programming the appropriate control register of the interrupting module
(see section “Peripheral Modules” on page 30).
TOS-1
CCR
RAM
TOS-2
TOS-3
SP
TOS
ALU
TOS-4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| T48C862x-Rf-TNS | Microcontroller with UHF ASK/FSK Transmitter |
| T48C893 | The multiple times programmable (MTP) version for the MARC4 ROM types |
| T48C893-TK | The multiple times programmable (MTP) version for the MARC4 ROM types |
| T48C893-TKQ | The multiple times programmable (MTP) version for the MARC4 ROM types |
| T500 | DIL 14 PIN SINGLE OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T48C862X-RF-TNS | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller with UHF ASK/FSK Transmitter |
| T48C893 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:The multiple times programmable (MTP) version for the MARC4 ROM types |
| T48C893-TK | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:The multiple times programmable (MTP) version for the MARC4 ROM types |
| T48C893-TKQ | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:The multiple times programmable (MTP) version for the MARC4 ROM types |
| T48D | 制造商:WELWYN 制造商全稱:Welwyn Components Limited 功能描述:High Voltage Precision Thick Film Resistors |
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