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CC2430-RTR1-F32 数据表(PDF) 48 Page - Texas Instruments |
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CC2430-RTR1-F32 数据表(HTML) 48 Page - Texas Instruments |
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48 / 234 page ![]() CC2430 CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A Page 48 of 232 12.5.5 Stack Pointer The stack resides in DATA memory space and grows upwards. The PUSH instruction first increments the Stack Pointer (SP) and then copies the byte into the stack. The Stack Pointer is initialized to 0x07 after a reset and it is incremented once to start from location 0x08 which is the first register (R0) of the second register bank. Thus, in order to use more than one register bank, the SP should be initialized to a different location not used for data storage. SP (0x81) – Stack Pointer Bit Name Reset R/W Description 7:0 SP[7:0] 0x07 R/W Stack Pointer 12.6 Instruction Set Summary The 8051 instruction set is summarized in Table 27. All mnemonics copyrighted © Intel Corporation, 1980. The following conventions are used in the instruction set summary: • Rn – Register R7-R0 of the currently selected register bank. • direct – 8-bit internal data location’s address. This can be DATA area (0x00 – 0x7F) or SFR area (0x80 – 0xFF). • @Ri – 8-bit internal data location, DATA area (0x00 – 0xFF) addressed indirectly through register R1 or R0. • #data – 8-bit constant included in instruction. • #data16 – 16-bit constant included in instruction. • addr16 – 16-bit destination address. Used by LCALL and LJMP. A branch can be anywhere within the 64 KB CODE memory space. • addr11 – 11-bit destination address. Used by ACALL and AJMP. The branch will be within the same 2 KB page of program memory as the first byte of the following instruction. • rel – Signed (two’s complement) 8-bit offset byte. Used by SJMP and all conditional jumps. Range is –128 to +127 bytes relative to first byte of the following instruction. • bit – direct addressed bit in DATA area or SFR. The instructions that affect CPU flag settings located in PSW are listed in Table 28 on page 52. Note that operations on the PSW register or bits in PSW will also affect the flag settings. |
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