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
Address:: 0xFFD
Reset:
Access:

Bit23	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
Bit15	14	13	12	11	10	9	8
TOSH[7:0]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0
Bit7	6	5	4	3	2	1	0
TOSL[7:0]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0

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

Upper byte of TOS register

Bits [21:17] of the TOS

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

High Byte of the TOS Register

Bits [16:8] of the TOS

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

Low Byte TOS Register

Bits [7:0] of the TOS