MC68HC711PH8 Motorola, MC68HC711PH8 Datasheet - Page 109

• Manufacturer Part Number: MC68HC711PH8
• Description: High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
• Manufacturer: Motorola

5.8.5
In the S2SR2 only bit 0 is used, to indicate receiver active (see Section 5.6.5 for details). The other
seven bits always read zero.
5.8.6
S2DRH/S2DRL is a parallel register that performs two functions. It is the receive data register
when it is read, and the transmit data register when it is written. Reads access the receive data
buffer and writes access the transmit data buffer. Data received or transmitted is double buffered.
See Section 5.6.6 for more details.
MC68HC11PH8
SCI2/MI data high (S2DRH)
SCI2/MI data low (S2DRL)
SCI2/MI status 2 (S2SR2)
S2SR2 — SCI2 status register 2
S2DRH, S2DRL — SCI2 data high/low registers
SERIAL COMMUNICATIONS INTERFACE
Address
Address
$0055
$0056
$0057 R7T7B R6T6B R5T5B R4T4B R3T3B R2T2B R1T1B R0T0B undeÞned
R8B
bit 7
bit 7
0
bit 6
bit 6
T8B
0
bit 5
bit 5
0
0
bit 4
bit 4
0
0
bit 3
bit 3
0
0
bit 2
bit 2
0
0
bit 1
bit 1
0
0
RAF2 0000 0000
bit 0
bit 0
0
MOTOROLA
undeÞned
on reset
on reset
State
State
TPG
5-17
5