em78p131a ELAN Microelectronics Corp, em78p131a Datasheet - Page 15

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

Product Specification (V1.2) 09.16.2009
(This specification is subject to change without further notice)
Bit 2 (/PH2): Control bit is used to enable pull-high of the P62 pin.
Bit 3:
Bit 4 (/PH4): Control bit used to enable pull-high of the P64 pin.
Bit 5 (/PH5): Control bit used to enable pull-high of the P65 pin.
Bit 6 (/PH6): Control bit used to enable pull-high of the P66 pin.
Bit 7 (/PH7): Control bit used to enable pull-high of the P67 pin.
The IOCD Register is both readable and writable.
5.2.7 IOCE (WDT Control Register)
Bit 0 (LVDEN): LVD function enable bit
Bit 1 (LVDSEL): LVD level select bit
Bit 2 (LVDF): Low voltage detector flag
Bits 3~ 5:
Bit 6 (EIS):
Bit 7 (WDTE): Control bit used to enable the Watchdog timer.
WDTE
Bit 7
Not used
Bit 6
Not used
Control bit is used to define the function of the P60 (/INT) pin.
EIS
0 : P60, bidirectional I/O pin.
1 : /INT, external interrupt pin. In this case, the I/O control bit of P60
When EIS is "0," the path of /INT is masked. When EIS is "1," the status
of /INT pin can also be read by way of reading Port 6 (R6). See Figure
5-6 under Section 5.4 for reference.
EIS is both readable and writable.
0 : Disable WDT
1 : Enable WDT
WDTE is both readable and writable.
0: disable
1: enable
0: set LVD level to 2.4V (with ± 0.3V allowance for error).
1: set LVD level to 3.6V (with ± 0.3V allowance for error).
(Bit 0 of IOC6) must be set to "1."
Bit 5
-
Bit 4
-
Bit 3
8-Bit Microcontroller with OTP ROM
-
LVDF
Bit 2
LVDSEL
Bit 1
EM78P131A
LVDEN
Bit 0
• 11