DF61657CN35FTV Renesas Electronics America, DF61657CN35FTV Datasheet - Page 188
DF61657CN35FTV
Manufacturer Part Number
DF61657CN35FTV
Description
IC H8SX/1657 MCU FLASH 120TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8SX/1600r
Datasheet
1.DF61656N35FTV.pdf
(894 pages)
Specifications of DF61657CN35FTV
Core Processor
H8SX
Core Size
32-Bit
Speed
35MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, PWM, WDT
Number Of I /o
82
Program Memory Size
768KB (768K x 8)
Program Memory Type
FLASH
Ram Size
24K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
120-TQFP, 120-VQFP
For Use With
3DK1657 - DEV EVAL KIT FOR H8SX/1657
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Section 6 Bus Controller (BSC)
6.5.3
This LSI can output chip select signals (CS0 to CS7) for areas 0 to 7. The signal outputs low when
the corresponding external address space area is accessed. Figure 6.8 shows an example of CSn (n
= 0 to 7) signal output timing.
Enabling or disabling of CSn signal output is set by the port function control register (PFCR). For
details, see section 9.3, Port Function Controller.
In on-chip ROM disabled extended mode, pin CS0 is placed in the output state after a reset. Pins
CS1 to CS7 are placed in the input state after a reset and so the corresponding PFCR bits should
be set to 1 when outputting signals CS1 to CS7.
In on-chip ROM enabled extended mode, pins CS0 to CS7 are all placed in the input state after a
reset and so the corresponding PFCR bits should be set to 1 when outputting signals CS0 to CS7.
The PFCR can specify multiple CS outputs for a pin. If multiple CSn outputs are specified for a
single pin by the PFCR, CS to be output are generated by mixing all the CS signals. In this case,
the settings for the external bus interface areas in which the CSn signals are output to a single pin
should be the same.
Figure 6.9 shows the signal output timing when the CS signals to be output to areas 5 and 6 are
output to the same pin.
Rev. 2.00 Jun. 28, 2007 Page 162 of 864
REJ09B0341-0200
Chip Select Signals
Figure 6.8 CSn Signal Output Timing (n = 0 to 7)
Bφ
Address bus
CSn
T
External address of area n
1
Bus cycle
T
2
T
3
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