Freescale Semiconductor MCF51QE128RM manual Memory Map/Register Definition, Rgpio Write Memory Map

Chapter 9 Rapid GPIO (RGPIO)

9.3Memory Map/Register Definition

The RGPIO module provides a compact 16-byte programming model based at a system memory address of 0x(00)C0_0000 (noted as RGPIO_BASE throughout the chapter). As previously noted, the programming model views are different between reads and writes as this enables simplified software for manipulation of the RGPIO pins. Additionally, the programming model can be referenced using any operand size access (byte, word, longword).

9.3.1Memory Map

The RGPIO programming model maps are shown in Table 9-3and Table 9-4.

Table 9-3. RGPIO Write Memory Map

Offset	Register	Width	Access	Reset Value	Section/Page
Address		(bits)
0x0	RGPIO Data Direction Register (RGPIO_DIR)	16	W	0x0000	9.3.2.1/9-200
0x2	RGPIO Write Data Register (RGPIO_DATA)	16	W	0x0000	9.3.2.2/9-200
0x4	RGPIO Pin Enable Register (RGPIO_ENB)	16	W	0x0000	9.3.2.3/9-201
0x6	RGPIO Write Data Clear Register (RGPIO_CLR)	16	W	N/A	9.3.2.4/9-201
0xA	RGPIO Write Data Set Register (RGPIO_SET)	16	W	N/A	9.3.2.5/9-202
0xE	RGPIO Write Data Toggle Register (RGPIO_TOG)	16	W	N/A	9.3.2.6/9-202

Table 9-4.RGPIO Read Memory Map

Offset	Register	Width	Access	Reset Value	Section/Page
Address		(bits)
0x0	RGPIO data direction register (RGPIO_DIR)	16	R	0x0000	9.3.2.1/9-200
0x2	RGPIO write data register (RGPIO_DATA)	16	R	0x0000	9.3.2.2/9-200
0x4	RGPIO pin enable register (RGPIO_ENB)	16	R	0x0000	9.3.2.3/9-201
0x6	RGPIO write data register (RGPIO_DATA)	16	R	0x0000	9.3.2.2/9-200
0x8	RGPIO data direction register (RGPIO_DIR)	16	R	0x0000	9.3.2.1/9-200
0xA	RGPIO write data register (RGPIO_DATA)	16	R	0x0000	9.3.2.2/9-200
0xC	RGPIO data direction register (RGPIO_DIR)	16	R	0x0000	9.3.2.1/9-200
0xE	RGPIO write data register (RGPIO_DATA)	16	R	0x0000	9.3.2.2/9-200

NOTE

Writes to the 2-byte fields at RGPIO_BASE + 0x8 and

RGPIO_BASE + 0xC are allowed, but do not affect any program-visible register within the RGPIO module.

MCF51QE128 MCU Series Reference Manual, Rev. 3

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