Nortel Networks MSC8101 ADS user manual Peripheral’s Availability Decoding, BCSR2 Description

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Functional Description

TABLE 5-11. Peripheral’s Availability Decoding.

		BCSR Control Bits
Enable to:
	FETHIEN	T1_1EN	T1_234EN	CODEC_EN
	1.4	0.3	0.4	1.1
CODECa	x	x	x	0
T1/E1	1	x	0	x
channels
2-4
FETH	0	x	x	x
T1/E1	x	0	x	1
channel
1

a. Power-on default mode is enable for CODEC and disable for the rest peripherals.

5•11•3 BCSR2 - Board Control / Status Register 2

BCSR2 is a status register which is accessed as word at offset 8 from the BCSR base address. Its a Read-Onlyregister which may be read at any time. BCSR2’s various fields are described in TABLE 5-12. "BCSR2 Description" on page 58

TABLE 5-12. BCSR2 Description

BIT	MNEMONIC	Function	DEF	ATT.
			SET
0 - 7	TSTAT(0:7)	Tool Status (0:7). This field is reserved for external tool status report. The	-	R
		exact meaning of each bit within this field is tool unique and therefore will be
		documented separately per each tool. These signals are available at the
		System Expansion connector.
8 - 11	TOOLREV(0:3)	Tool Revision (0:3). This field may contains the revision code of an	-	R
		external tool connected to the ADS. The various combinations of this field
		will be described per each tool user’s manual. These signals are available
		at the System Expansion connector.
12 - 15	EXTTOLI(0:3)	External Tools Identification. These lines, which are available at the CPM	-	R
		expansion connectors, are intended to serve as tools’ identifier. On-board S/
		W may check these lines to detect The presence of various tools (h/w
		expansions) at the CPM Expansion connectors. For the external tools’
		codes and their associated combinations see TABLE 5-16.
		"EXTOOLI(0:3) Assignment" on page 61.
16 - 17	SWOPT(0:1)a	Software Option (0:1). Two bits shows the state of a dedicated dip-	0	R
		switches providing an option to manually change a program flow.
18	HOSTCFG	Host Configuration Set. This is high when the MSC8101 is configured for	1	R
		PPC bus Normal Mode, if low - Host I/F is enable.
19	B64_32	Data Bus 64/32 bit. This line is connected to address mux switch for	1	R
		manually setting the PPC bus width. When it is high the PPC bus is 64-bit
		width, if low - 32-bit width.

58 MSC8101ADS RevB User’s Manual MOTOROLA

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