参数资料
型号: P89V51RD2FA,512
厂商: NXP Semiconductors
文件页数: 13/80页
文件大小: 0K
描述: IC 80C51 MCU FLASH 64K 44-PLCC
产品培训模块: Migrating from 8/16-Bit MCUs to 32-Bit ARMs
标准包装: 26
系列: 89V
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 32
程序存储器容量: 64KB(64K x 8)
程序存储器类型: 闪存
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
产品目录页面: 706 (CN2011-ZH PDF)
配用: 622-1017-ND - BOARD 44-ZIF PLCC SOCKET
622-1001-ND - USB IN-CIRCUIT PROG 80C51ISP
其它名称: 568-1290-5
935276046512
P89V51RD2FA
P89V51RB2_RC2_RD2_5
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 12 November 2009
20 of 80
NXP Semiconductors
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
6.3 Flash memory IAP
6.3.1 Flash organization
The P89V51RB2/RC2/RD2 program memory consists of a 16/32/64 kB block. ISP
capability, in a second 8 kB block, is provided to allow the user code to be programmed
in-circuit through the serial port. There are three methods of erasing or programming of
the ash memory that may be used. First, the ash may be programmed or erased in the
end-user application by calling low-level routines through a common entry point (IAP).
Second, the on-chip ISP bootloader may be invoked. This ISP bootloader will, in turn, call
low-level routines through the same common entry point that can be used by the end-user
application. Third, the ash may be programmed or erased using the parallel method by
using a commercially available EPROM programmer which supports this device.
6.3.2 Boot block (block 1)
When the microcontroller programs its own ash memory, all of the low level details are
handled by code that is contained in block 1. A user program calls the common entry point
in the block 1 with appropriate parameters to accomplish the desired operation. Boot block
operations include erase user code, program user code, program security bits, etc.
Fig 7.
Dual data pointer organization
Table 10.
AUXR1 - Auxiliary register 1 (address A2H) bit allocation
Not bit addressable; Reset value 00H
Bit
7
6
5
4
3
2
1
0
Symbol
-
GF2
0
-
DPS
Table 11.
AUXR1 - Auxiliary register 1 (address A2H) bit description
Bit
Symbol
Description
7 to 4
-
Reserved for future use. Should be set to ‘0’ by user programs.
3
GF2
General purpose user-dened ag.
2
0
This bit contains a hard-wired ‘0’. Allows toggling of the DPS bit by
incrementing AUXR1, without interfering with other bits in the register.
1
-
Reserved for future use. Should be set to ‘0’ by user programs.
0
DPS
Data pointer select. Chooses one of two Data Pointers for use by the
program. See text for details.
DPL
82H
DPS = 0
→ DPTR0
DPS = 1
→ DPTR1
external data memory
DPS
002aaa518
DPH
83H
DPTR0
DPTR1
AUXR1 / bit0
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