CHAPTER 2 PIN FUNCTIONS
46
User’s Manual U14492EJ3V0UD
(3/3)
Pin Name
I/O
Function
Alternate Function
WAIT
I
Control signal input to insert wait in bus cycle
PCM0
HLDAK
O
Bus hold acknowledge output
PCM2
HLDRQ
I
Bus hold request input
PCM3
LWR
O
External data lower byte write strobe signal output
PCT0
UWR
O
External data upper byte write strobe signal output
PCT1
RD
O
External data bus read strobe signal output
PCT4
ASTB
O
External data bus address strobe signal output
PCT6
CS0
PCS0
CS1
PCS1
CS2
PCS2
CS3
PCS3
CS4
PCS4
CS5
PCS5
CS6
PCS6
CS7
O
Chip select signal output
PCS7
AD0 to AD15
I/O
16-bit address/data bus for external memory
PDL0 to PDL15
A16 to A23
O
Upper 8-bit address bus for external memory
PDH0 to PDH7
RESET
I
System reset input
−
X1
I
−
X2
−
Crystal resonator connection pin for system clock generation
Input to X1 pin when providing clocks from outside.
−
CLKOUT
O
System clock output
PCM1
CKSEL
I
Input specifying clock generator operation mode
−
AV
REF0
I
Reference voltage input for A/D converter 0
−
AV
REF1
I
Reference voltage input for A/D converter 1
−
AV
DD
−
Positive power supply for A/D converter
−
AV
SS
−
Ground potential for A/D converter
−
CV
DD
−
Positive power supply for dedicated clock generator
−
CV
SS
−
Ground potential for dedicated clock generator
−
V
DD5
−
Positive power supply for peripheral interface
−
V
SS5
−
Ground potential for peripheral interface
−
V
DD3
−
3.3 V positive power supply pin for internal CPU
−
V
SS3
−
Ground potential for internal CPU
−
CLK_DBG
Note
I
Debugging interface clock input (3.3 V interface)
−
SYNC
Note
I
Debugging interface command synchronization input (3.3 V interface)
−
AD0_DBG
Note
−
AD1_DBG
Note
−
AD2_DBG
Note
−
AD3_DBG
Note
I/O
Command interface input for debugging (3.3 V interface)
−
TRIG_DBG
Note
O
Address match trigger signal output for debugging (3.3 V interface)
−
Note
µ
PD70F3116 only
Содержание V850E/IA1 mPD703116
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