233
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.
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)
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)
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)
Port 7
Port 7 pins
Figure 5.7 Port 7 Pin Functions
Summary of Contents for H8S/2670
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