mc68hc11c0 Freescale Semiconductor, Inc, mc68hc11c0 Datasheet - Page 10

• Manufacturer Part Number: mc68hc11c0
• Description: 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Bit 4 — Not implemented
PSEL[3:0] — Priority Select Bits [3:0]
OPT2 — System Configuration Options 2
Bits [7:5] — Not implemented
IRVNE — Internal Read Visibility/Not E
Bits [3:0] — Not implemented
10
Expanded
Special Test
Single Chip
Bootstrap
MOTOROLA
RESET:
Always reads zero
Refer to 6 Resets and Interrupts .
Always read zero
IRVNE can be written once in any mode. In expanded and special-test modes, IRVNE determines
whether IRV is on or off. In special test mode, IRVNE is reset to one. In all other modes, IRVNE is reset
to zero.
In single-chip and bootstrap modes this bit determines whether the E clock drives out from the chip.
Always read zero
0 = No internal read visibility on external bus
1 = Data from internal reads is driven out the external data bus.
0 = E is driven out from the chip.
1 = E pin is driven low. Refer to the following table.
Mode
Bit 7
—
0
—
6
0
Freescale Semiconductor, Inc.
IRVNE Out
of Reset
For More Information On This Product,
0
1
0
0
—
5
0
Go to: www.freescale.com
IRVNE
4
0
E Clock Out
of Reset
On
On
On
On
—
3
0
IRV Out of
—
2
0
Reset
Off
On
Off
Off
—
1
0
Affects Only
$0038
IRVNE
Bit 0
IRV
IRV
—
0
E
E
MC68HC11C0TS/D
MC68HC11C0
IRVNE Can
Be Written
Once
Once
Once
Once