Table of Contents
Advertisement
Prelminary
2004.11.12
SYSTEM (9 pin)
Pin name
Pin no.
XINI
8
INITXI
204
NMIX
206
INT7
150
INT6
87
INT5
16
MDI2
80
MDI1
142
79
MDI0
OSCILLATOR (3 pin)
Pin name
Pin no.
OSCEA
12
OSCC
145
OSCEB
10
PLL CONTROL (5 pin)
Pin name
Pin no.
PLLS
147
PLLSET1
144
PLLSET0
81
PLLBYPAS
9
CLKSEL
77
I/O
Polarity
Circuit
Clock input pin
IN
D
Input pin of clock generated in clock generator. 10 MHz to
50 MHz frequency can be input.
Reset input pin
This pin inputs a signal to initialize the LSI.
Nega-
When turning on the power supply, apply "0" to the pin until
IN
D
the clock signal input to the CLKIN pin becomes stable.
tive
All built-in registers and external pins are initialized, and the
built-in PLL is stopped when "0" is asserted to INITXI.
Nega-
NMI input pin
IN
D
tive
Non-Maskable Interrupt signal
External interrupt input pins
These pins input an external interrupt request signal.
IN
D
For external interrupt detection, set the ENIR, EIRR and
ELVR registers of the FR core.
Mode pins
IN
D
These pins determine the operation mode of the LSI.
Always set this bit to "001".
I/O
Polarity
Circuit
Crystal oscillation input pin
IN
G
Input pin of crystal oscillation cell.
Crystal oscillation control input pin
Nega-
Oscillation control pin of crystal oscillation cell.
IN
D
tive
"0" : Oscillation
"1" : Oscillation stop
Crystal oscillation output pin
OUT
G
Output pin of crystal oscillation cell.
I/O
Polarity
Circuit
PLL/through mode (reset) switching input pin
IN
D
"0" : PLL through mode (oscillation stop)
"1" : PLL oscillation mode
Input clock division ratio select input pin
IN
D
"0" : Input clock direct
"1" : Input clock divided by 2
Division ratio select input to PLL FB pin
IN
D
"0" : Two dividing frequency is input to the terminal FB.
"1" : Four dividing frequency is input to the terminal FB.
PLL bypass select input pin
IN
D
"0" : PLL used
"1" : PLL unused
Input clock switching input pin
IN
D
"0" : XINI (External clock)
"1" : Built-in OSC generating clock
MB91401
Function/application
Function/application
Function/application
7
Advertisement
Table of Contents
