Freescale Semiconductor SC140 Data Event Detection Channel Edcd, Edcd Control Register Edcdctrl

Event Detection Unit (EDU) Channels and Registers

4.9.2 Data Event Detection Channel (EDCD)

In order to set a watchpoint on a given data value, the user should:

•Write the watched value into the EDCD_REF.

•Enter a write mask into the EDCD_MASK.

•Specify the type of access (read or write) in the EDCD_CTRL.

•Specify the data type (byte/word/long) in the EDCD_CTRL.

•Enable the event detection unit in EDCD_CTRL, as the last action. The following sections describe the functionality of these registers.

4.9.2.1 EDCD Control Register (EDCD_CTRL)

Figure 4-22 displays the configuration of EDCD_CTRL.

	BIT 15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	BIT 0
								AWS			EDCDEN			CCS		ATS
TYPE	rw	rw	rw	rw	rw	rw	rw	rw	rw	rw	rw	rw	rw	rw	rw	rw
RESET	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

The shaded bits are reserved and should be initialized with zeros for future software compatibility.

Figure 4-22. EDCD Control Register (EDCD_CTRL)

Table 4-20 describes the EDCD_CTRL fields.

Table 4-20. EDCD_CTRL Description

Name Description Settings

RReserved

Bits 14-15

RReserved

Bits 13–10

4-58 SC140 DSP Core Reference Manual