HD64F36049 datasheet(268/562 Pages) RENESAS

Part #	HD64F36049

Description	Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Tiny Series

PDF	562 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 14 Timer Z

Rev. 3.00 Mar. 15, 2006 Page 236 of 526

REJ09B0060-0300

14.3.14

Interface with CPU

1. 16-bit register

TCNT and GR are 16-bit registers. Reading/writing in a 16-bit unit is enabled but disabled in

an 8-bit unit since the data bus with the CPU is 16-bit width. These registers must always be

accessed in a 16-bit unit. Figure 14.5 shows an example of accessing the 16-bit registers.

Internal data bus

Bus interface

Module data bus

TCNTL

TCNTH

Figure 14.5 Accessing Operation of 16-Bit Register (between CPU and TCNT (16 bits))

2. 8-bit register

Registers other than TCNT and GR are 8-bit registers that are connected internally with the

CPU in an 8-bit width. Figure 14.6 shows an example of accessing the 8-bit registers.

TSTR

Internal data bus

Bus interface

Module data bus

Figure 14.6 Accessing Operation of 8-Bit Register (between CPU and TSTR (8 bits))

HD64F36049 Datasheet(PDF) 268 Page - Renesas Technology Corp