Keil C51/8051 Data types and pointers

Keil data types and limits Data type  typedef # of Bits # of bytes  Range bit (this is not an ISO type)   --- 1  -   0 or 1 sbit (this is not an ISO type)   --- 1  -   0 or 1  sfr (this is not an ISO type)   ---  8  1   0 to 255  sfr16 (this is not an ISO type)   --- 16  2  0 to 65535  enum   ---  8/16  1/2  -128 to +127 OR -32768 to +32767  signed char  int8_t 8  1  -128 to +127 unsigned char  uint8_t 8  1  0 to 255 signed short  ---  16   2  -32768 to +32767 unsigned short   ---  16   2  0 to 65535  signed int  int16_t  16  2  -32768 to +32767  unsigned int  uint16_t  16  2  0 to 65535   signed long  int32_t  32  4  -2147483648 to +2147483647  unsigned long  uint32_t  32  4  0 to 4294967295  float  float32_t   32  4 +/-1.175494E-38 to +/-13.402823E+38

Keil Pointer types and limits

Last updated 24 Jan 2003 and still under construction! Copyright Chris A Hills 2002 The right of Chris A Hills to be identified as the author of this work has been asserted by him in accordance with the Copyright, Designs and Patents Act 1988