em78p131a ELAN Microelectronics Corp, em78p131a Datasheet - Page 32

• Manufacturer Part Number: em78p131a
• Description: 8-bit Microcontroller With Otp Rom
• Manufacturer: ELAN Microelectronics Corp

EM78P131A
8-Bit Microcontroller with OTP ROM
28 •
Table 9
Table 10 Set-up Time of Device Programming
Bit 2 (HLP):
Note: The transient point of system frequency between HXT and LXY is 400kHz.
Bit 9 and Bit 8 (OSC1 and OSC0): Oscillator Modes Selection bits.
Bit 7 (
Bit 6 and Bit 5 (SUT1 and SUT0): Set-up Time of device bits.
B
Bit 3 (RCOUT): Selec
Bits 2~ 0 (C2~C 0): C
IRC (Internal RC osc
ERC (External RC o
H
L
it 4 (T pe): Ty e sele tion fo EM7 P131A
XT (Low C
XT (High
Code Option Register (Word 1)
SUT1
CS): Code Security Bit
1
1
0
0
y
Bit 2
HLP
Oscillator Modes defined by OSC1 and OSC0
RCOUT
Crystal os
TYPE
rystal os
0
1
0
1
0 : Security On
1 :
p
Mode
Security Off
scillator
cillator
SUT0
illator m
C2, C1, C0 must be set to “1” only.
0
1
cillator
P
1
0
1
0
tion bit of Oscillator o
alibrator of
ower Consumption Select
: Low power consumption
: High power consumption
c
*
mode)
Theoretical v
Word 1
mode)
mode)
ode)
RCM1
Bit 1
r
internal RC mode Bit 3
8
(This specification is subject to change without further notice)
alues, for
*Set-up Time
Pin Function
EM78P131A
288 ms
Series
4.5 ms
OSCO
18 ms
72 ms
utput or I/O port
P64
×
OSC1
Product Specification (V1.2) 09.16.2009
reference only
RCM0
ion Bit
1
1
0
0
Bit 0
OSC0
1
0
1
0