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參數(shù)資料
| 型號： | P89V664FBC,557 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 7/90頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 80C51 MCU FLASH 64K 44-TQFP |
| 產(chǎn)品培訓(xùn)模塊： | Migrating from 8/16-Bit MCUs to 32-Bit ARMs |
| 標準包裝： | 800 |
| 系列： | 89V |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 40MHz |
| 連通性： | I²C，SPI，UART/USART |
| 外圍設(shè)備： | POR，PWM，WDT |
| 輸入/輸出數(shù)： | 36 |
| 程序存儲器容量： | 64KB（64K x 8） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 2K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 4.5 V ~ 5.5 V |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 44-TQFP |
| 包裝： | 托盤 |
| 產(chǎn)品目錄頁面： | 706 (CN2011-ZH PDF) |
| 配用： | 622-1001-ND - USB IN-CIRCUIT PROG 80C51ISP |
| 其它名稱： | 568-2437 935280835557 P89V664FBC |
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P89V660_662_664
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3.1 — 17 October 2011
15 of 90
NXP Semiconductors
P89V660/662/664
80C51 with 512 B/1 kB/2 kB RAM, dual I2C-bus, SPI
for the 89V662, above 6FFH for the 89V664) will access external off-chip memory and will
perform in the same way as the standard 8051, with P0 and P2 as data/address bus, and
P3[6] and P3[7] as write and read timing signals.
When EXTRAM = 0, MOVX @Ri and MOVX @DPTR will be similar to the standard 8051.
Using MOVX @Ri provides an 8-bit address with multiplexed data on Port 0. Other output
port pins can be used to output higher order address bits. This provides external paging
capabilities. Using MOVX @DPTR generates a 16-bit address. This allows external
addressing up the 64 kB. Port 2 provides the high-order eight address bits (DPH), and
Port 0 multiplexes the low order eight address bits (DPL) with data. Both MOVX @Ri and
MOVX @DPTR generates the necessary read and write signals (P3[6] - WR and P3[7] -
RD) for external memory use. Table 7 shows external data memory RD, WR operation
with EXTRAM bit.
The stack pointer (SP) can be located anywhere within the 256 B of internal RAM (lower
128 B and upper 128 B). The stack pointer may not be located in any part of the expanded
RAM.
Table 6.
AUXR - Auxiliary register (address 8EH) bit description
Bit
Symbol
Description
7 to 2
-
Reserved for future use. Should be set to ‘0’ by user programs.
1
EXTRAM
Internal/External RAM access using MOVX @Ri/@DPTR. When ‘1’,
accesses internal XRAM with address specified in MOVX instruction.
If address supplied with this instruction exceeds on-chip available
XRAM, off-chip RAM is accessed. When ‘0’, every MOVX instructions
targets external data memory by default.
0
AO
ALE off: disables/enables ALE. AO = 0 results in ALE emitted at a
constant rate of 12 the oscillator frequency. In case of AO = 1, ALE is
active only during a MOVX or MOVC.
Table 7.
External data memory RD, WR with EXTRAM bit
AUXR
MOVX @DPTR, A or MOVX A,
@DPTR
MOVX @Ri, A or MOVX A, @Ri
ADDR < 0100H
(89V660)
ADDR
0100H
(89V660)
ADDR = any
ADDR < 0300H
(89V662)
ADDR
0300H
(89V662)
ADDR < 0700H
(89V664)
ADDR
0700H
(89V664)
EXTRAM = 0
RD/WR asserted
EXTRAM = 1
RD/WR not
asserted
RD/WR asserted
RD/WR not asserted
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