Port 7; Overview - Hitachi H8S/2678 Series Reference Manual

5.8

Port 7

5.8.1

Overview

Port 7 is a 6-bit I/O port. Port 7 pins also function as DMAC input/output pins (DREQ0, TEND0,
DACK0, DREQ1, TEND1, and DACK1) and EXDMAC input/output pins (EDREQ0, ETEND0,
EDACK0, EDREQ1, ETEND1, and EDACK1). The functions of pins P75 to P70 change
according to the operating mode.
DMAC input/output pins can be switched to port 6 by setting the DMACS bit in PFCR2.
Figure 5.7 shows the port 7 pin configuration.
Port 7 pins
P75 (I/O) / DACK1 (output) / EDACK1 (output)
P74 (I/O) / DACK0 (output) / EDACK0 (output)
P73 (I/O) / TEND1 (output) / ETEND1 (output)
Port 7
P72 (I/O) / TEND0 (output) / ETEND0 (output)
P71 (I/O) / DREQ1 (input) / EDREQ1 (input)
P70 (I/O) / DREQ0 (input) / EDREQ0 (input)
Modes 1, 2, 4, 5, 6, 7 (EXPE = 1)
P75 (I/O) / DACK1 (output) / EDACK1 (output)
P74 (I/O) / DACK0 (output) / EDACK0 (output)
P73 (I/O) / TEND1 (output) / ETEND1 (output)
P72 (I/O) / TEND0 (output) / ETEND0 (output)
P71 (I/O) / DREQ1 (input) / EDREQ1 (input)
P70 (I/O) / DREQ0 (input) / EDREQ0 (input)
Figure 5.7 Port 7 Pin Functions
Mode 7 (EXPE = 0)
P75 (I/O) / DACK1 (output)
P74 (I/O) / DACK0 (output)
P73 (I/O) / TEND1 (output)
P72 (I/O) / TEND0 (output)
P71 (I/O) / DREQ1 (input)
P70 (I/O) / DREQ0 (input)
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