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R5F64188HPFB Datasheet(PDF) 20 Page - Renesas Technology Corp

Part No. R5F64188HPFB
Description  RENESAS MCU
Download  126 Pages
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Maker  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
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R5F64188HPFB Datasheet(HTML) 20 Page - Renesas Technology Corp

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REJ03B0255-0110
Rev.1.10
Page 20 of 123
Jun 23, 2010
R32C/118 Group
1. Overview
Note:
1.
Pins
BC2/D1, WR2, WR3, BC2, and BC3 are available in the 144-pin package only.
Table 1.15
Pin Definitions and Functions (2/4)
Function
Symbol
I/O
Description
Bus control pins
BC0/D0, BC2/D1
(1)
I/O
Output of byte control (
BC0 and BC2) and input/output of
data (D0 and D1) by time-division while accessing an
external memory space with multiplexed bus
CS0 to CS3
O
Chip select output
WR0/WR1/WR2/
WR3
WR/BC0/BC1/
BC2/BC3
RD (1)
O
Output of write, byte control, and read signals. Either
WRx
or
WR and BCx can be selected by a program.
Data is read when
RD is low.
• When
WR0, WR1, WR2, WR3, and RD are selected,
data is written to the following address:
4n+0, when
WR0 is low
4n+1, when
WR1 is low
4n+2, when
WR2 is low
4n+3, when
WR3 is low
on 32-bit external data bus
or
an even address, when
WR0 is low
an odd address, when
WR1 is low
on 16-bit external data bus
• When
WR, BC0, BC1, BC2, BC3, and RD are selected,
data is written, when
WR is low
and
the following address is accessed:
4n+0, when
BC0 is low
4n+1, when
BC1 is low
4n+2, when
BC2 is low
4n+3, when
BC3 is low
on 32-bit external data bus
or
an even address, when
BC0 is low
an odd address, when
BC1 is low
on 16-bit external data bus
ALE
O
Latch enable signal in multiplexed bus format
HOLD
I
The MCU is in a hold state while this pin is held low
HLDA
O
This pin is driven low while the MCU is held in a hold state
RDY
I
Bus cycle is extended by the CPU if this pin is low on the
falling edge of the BCLK


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