Before some day i posted about 8051 CPU and as you all know it has many disadvantages. Currently lots different chips are available in the market which has 8051 as a CPU. All these chips have different features and characteristics.
Main problem with 80c51 is it does not support ISP and IAP, It has limited size of on chip ROM and RAM. So what will you do if the size of your machine code is more than 4Kb and it requires more RAM to process on data. One Possible solution is you can interface external memory but this required one more external chip and you have to reserve some pins for interfacing or for communication with with memory chip.
So how you feel if you get more memory space on a single chip...??? Here i am going to talk about P89v51xx family. There are main three chips are available in this family...
1) P89v51RB2
2) P89v51RC2
3) P89v51RD2
Memory Space:
Chip
|
Size of ROM
(kB)
|
Size of RAM
(kB)
|
Range of
frequency
(MHz)
|
P89v51RB2
|
16
|
1
|
Up to 40MHz
|
P89v51RC2
|
32
|
1
|
Up to 40MHz
|
P89v51RD2
|
64
|
1
|
Up to 40MHz
|
Pin diagram and architecture:
Mode of Operation:
P89v51 family supports two mode of operation in first mode i.e X1, chip is operates in simple 80c51 clock rate which is 12 clocks per machine cycle. and in second mode i.e X2, chip is operates in 6 clocks per machine cycle.
Features of P89v51XX:
1) CPU: 80c51
2) Power supply: 5V
3) Operating frequency: up to 40MHz
4) Three high current ports (16mA)
5) Three 16-bit timers and counter
6) Eight interrupt sources with four priority level
7) Two DPTR register
8) Support ISP and IAP
9) Brownout detection
10) Watchdog timer
This chip can be programmed by using "Flash Magic tool" which is easy and freeware to use. Click here for how to program P89v51XX using Flash Magic...
Download Datasheet
0 comments:
Post a Comment
Note: Only a member of this blog may post a comment.