11.8.3 TOS

Top-Of-Stack Registers.

Contents of the stack pointed to by the STKPTR register. This is the value that will be loaded into the Program Counter upon a RETURN or RETFIE instruction.

Name:	TOS
Offset:	0xFFD


Bit	23	22	21	20	19	18	17	16
				TOSU[4:0]
Access				R/W	R/W	R/W	R/W	R/W
Reset				0	0	0	0	0


Bit	15	14	13	12	11	10	9	8
	TOSH[7:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0


Bit	7	6	5	4	3	2	1	0
	TOSL[7:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0

Bits 20:16 – TOSU[4:0] Upper byte of TOS register

Bits [21:17] of the TOS

Bits 15:8 – TOSH[7:0] High Byte of the TOS Register

Bits [16:8] of the TOS

Bits 7:0 – TOSL[7:0] Low Byte TOS Register

Bits [7:0] of the TOS