Agilent Technologies E1563A, E1564A user manual Figure B-1. Registers Within A16 Address Space

Register Offset The register offset is the register’s location in the block of 64 address bytes. For example, the digitizer’s Status Register has an offset of 0416. When you write a command to this register, the offset is added to the base address to form the register address:

1FCA0016 + 0416 = 1FCA0416 or 2,083,328 + 4 = 2,083,332

		REGISTER	16-BIT WORDS
		OFFSET
FFFF 16		3E16	Sample Control/Source
		3C16	Trigger Control/Source
	FFFF16
COOO 16	REGISTER	3016	Sample Period High Byte
	ADDRESS	2E16	TRIG/INT Level CH4
	SPACE	2C16	TRIG/INT Level CH3
	*	2A16	TRIG/INT Level CH2
A16		2816	TRIG/INT Level CH1
ADDRESS
SPACE
	C00016	O4 16	Status/Control Register
		O2 16	Device Type Register
	(49,152)	OO 16	ID Register
			E1563/E1564
		A16 REGISTER MAP
OOOO 16	* Base Address = COOO16 + (Logical Address*64)16
		or
	49,152 + (Logical Address*64)10

Register Address = Base address + Register Offset

Figure B-1. Registers Within A16 Address Space

E1406

FFFFFF 16	ADDRESS MAP			REGISTER		16-BIT WORDS
				OFFSET
				3E	16	Sample Control/Source
				3C	16	Trigger Control/Source
EOOOOO 16		200000 16
				30		Sample Peroid High Byte
		IFCOOO 16	200000 16		16
				2E	16	TRIG/INT Level CH4
		A16		2C	16	TRIG/INT Level CH3
	A24		REGISTER	2A	16	TRIG/INT Level CH2
		ADDRESS		28	16	TRIG/INT Level CH1
	ADDRESS		ADDRESS
		SPACE
	SPACE		SPACE
			*	O4		Status/Control Register
		IFOOOO 16	IFCOOO 16		16
				O2	16	Device Type Register
200000 16			(2,080,768)	OO 16		ID Register
						E1563A/E1564A
IF0000 16		* Base Address = IFC00016 + (Logical Address*64) 16
						A16 REGISTER MAP
			or
			2,080,768 + (Logical Address*64) 10
000000 16		Register Address = Base address + Register Offset

Figure B-2. Registers Within the E1406 A16 Address Space

Appendix B Register-Based Programming 123