參數(shù)資料
型號： ADUC848BCPZ62-5
廠商： Analog Devices Inc
文件頁數(shù)： 24/108頁
文件大小： 0K
描述： IC MCU FLASH W/16BIT ADC 56LFCSP
標準包裝： 1
系列： MicroConverter® ADuC8xx
核心處理器： 8052
芯體尺寸： 8-位
速度： 12.58MHz
連通性： I²C，SPI，UART/USART
外圍設備： POR，PSM，PWM，溫度傳感器，WDT
輸入/輸出數(shù)： 34
程序存儲器容量： 62KB（62K x 8）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 4K x 8
RAM 容量： 2.25K x 8
電壓 - 電源 (Vcc/Vdd)： 4.75 V ~ 5.25 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 10x16b; D/A 1x12b，2x16b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 56-VFQFN 裸露焊盤，CSP
包裝： 托盤
ADuC845/ADuC847/ADuC848
Data Sheet
Rev. C | Page 22 of 108
Mnemonic
Description
Bytes
Cycles1
SJMP rel
Short jump (relative address)
2
3
JC rel
Jump on carry = 1
2
3
JNC rel
Jump on carry = 0
2
3
JZ rel
Jump on accumulator = 0
2
3
JNZ rel
Jump on accumulator ! = 0
2
3
DJNZ Rn,rel
Decrement register, JNZ relative
2
3
LJMP
Long jump unconditional
3
4
LCALL3 addr16
Long jump to subroutine
3
4
JB bit,rel
Jump on direct bit = 1
3
4
JNB bit,rel
Jump on direct bit = 0
3
4
JBC bit,rel
Jump on direct bit = 1 and clear
3
4
CJNE A,dir,rel
Compare A, direct JNE relative
3
4
CJNE A,#data,rel
Compare A, immediate JNE relative
3
4
CJNE Rn,#data,rel
Compare register, immediate JNE relative
3
4
CJNE @Ri,#data,rel
Compare indirect, immediate JNE relative
3
4
DJNZ dir,rel
Decrement direct byte, JNZ relative
3
4
Miscellaneous
NOP
No operation
1
One cycle is one clock.
2
MOVX instructions are four cycles when they have 0 wait state. Cycles of MOVX instructions are 4 + n cycles when they have n wait states as programmed via EWAIT.
3
LCALL instructions are three cycles when the LCALL instruction comes from an interrupt.
MEMORY ORGANIZATION
The ADuC845, ADuC847, and ADuC848 contain four memory
blocks:
62 kbytes/32 kbytes/8 kbytes of on-chip Flash/EE program
memory
4 kbytes of on-chip Flash/EE data memory
256 bytes of general-purpose RAM
2 kbytes of internal XRAM
Flash/EE Program Memory
The parts provide up to 62 kbytes of Flash/EE program memory
to run user code. All further references to Flash/EE program
memory assume the 62-kbyte option.
When EA is pulled high externally during a power cycle or a
hardware reset, the parts default to code execution from their
internal 62 kbytes of Flash/EE program memory. The parts do
not support the rollover from internal code space to external
code space. No external code space is available on the parts.
Permanently embedded firmware allows code to be serially
downloaded to the 62 kbytes of internal code space via the
UART serial port while the device is in-circuit. No external
hardware is required.
During run time, 56 kbytes of the 62-kbyte program memory
can be reprogrammed. This means that the code space can be
upgraded in the field by using a user-defined protocol running
on the parts, or it can be used as a data memory. For details, see
Flash/EE Data Memory
The user has 4 kbytes of Flash/EE data memory available that
can be accessed indirectly by using a group of registers mapped
into the special function register (SFR) space. For details, see
General-Purpose RAM
The general-purpose RAM is divided into two separate
memories, the upper and the lower 128 bytes of RAM. The
lower 128 bytes of RAM can be accessed through direct or
indirect addressing. The upper 128 bytes of RAM can be
accessed only through indirect addressing because it shares the
same address space as the SFR space, which must be accessed
through direct addressing.
The lower 128 bytes of internal data memory are mapped as
shown in Figure 8. The lowest 32 bytes are grouped into four
banks of eight registers addressed as R0 to R7. The next 16 bytes
(128 bits), locations 20H to 2FH above the register banks, form
a block of directly addressable bit locations at Bit Addresses
00H to 7FH. The stack can be located anywhere in the internal
memory address space, and the stack depth can be expanded up
to 2048 bytes.
Reset initializes the stack pointer to location 07H. Any call or
push pre-increments the SP before loading the stack. Therefore,
loading the stack starts from location 08H, which is also the
first register (R0) of Register Bank 1. Thus, if one is going to use
more than one register bank, the stack pointer should be
initialized to an area of RAM not used for data storage.
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