MC9S08QG8CPBE Freescale, MC9S08QG8CPBE Datasheet - Page 202
MC9S08QG8CPBE
Manufacturer Part Number
MC9S08QG8CPBE
Description
Manufacturer
Freescale
Datasheet
1.MC9S08QG8CPBE.pdf
(314 pages)
Specifications of MC9S08QG8CPBE
Cpu Family
HCS08
Device Core Size
8b
Frequency (max)
20MHz
Interface Type
I2C/SCI/SPI
Total Internal Ram Size
512Byte
# I/os (max)
12
Number Of Timers - General Purpose
1
Operating Supply Voltage (typ)
2.5/3.3V
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
1.8V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Through Hole
Pin Count
16
Package Type
PDIP
Program Memory Type
Flash
Program Memory Size
8KB
Lead Free Status / RoHS Status
Compliant
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Serial Communications Interface (S08SCIV3)
14.2.4
This register has eight read-only status flags. Writes have no effect. Special software sequences (which do
not involve writing to this register) are used to clear these status flags.
200
Reset
TDRE
Field
RWU
Field
SBK
RE
TC
2
1
0
7
6
W
R
TDRE
SCI Status Register 1 (SCIS1)
Receiver Enable — When the SCI receiver is off, the RxD pin reverts to being a general-purpose port I/O pin. If
LOOPS = 1, the RxD pin reverts to being a general-purpose I/O pin even if RE = 1.
0 Receiver off.
1 Receiver on.
Receiver Wakeup Control — This bit can be written to 1 to place the SCI receiver in a standby state where it
waits for automatic hardware detection of a selected wakeup condition. The wakeup condition is either an idle
line between messages (WAKE = 0, idle-line wakeup), or a logic 1 in the most significant data bit in a character
(WAKE = 1, address-mark wakeup). Application software sets RWU and (normally) a selected hardware
condition automatically clears RWU. Refer to
0 Normal SCI receiver operation.
1 SCI receiver in standby waiting for wakeup condition.
Send Break — Writing a 1 and then a 0 to SBK queues a break character in the transmit data stream. Additional
break characters of 10 or 11 bit times of logic 0 are queued as long as SBK = 1. Depending on the timing of the
set and clear of SBK relative to the information currently being transmitted, a second break character may be
queued before software clears SBK. Refer to
0 Normal transmitter operation.
1 Queue break character(s) to be sent.
Transmit Data Register Empty Flag — TDRE is set out of reset and when a transmit data value transfers from
the transmit data buffer to the transmit shifter, leaving room for a new character in the buffer. To clear TDRE, read
SCIS1 with TDRE = 1 and then write to the SCI data register (SCID).
0 Transmit data register (buffer) full.
1 Transmit data register (buffer) empty.
Transmission Complete Flag — TC is set out of reset and when TDRE = 1 and no data, preamble, or break
character is being transmitted.
0 Transmitter active (sending data, a preamble, or a break).
1 Transmitter idle (transmission activity complete).
TC is cleared automatically by reading SCIS1 with TC = 1 and then doing one of the following three things:
1
7
• Write to the SCI data register (SCID) to transmit new data
• Queue a preamble by changing TE from 0 to 1
• Queue a break character by writing 1 to SBK in SCIC2
= Unimplemented or Reserved
Table 14-4. SCIC2 Register Field Descriptions (continued)
TC
1
6
Table 14-5. SCIS1 Register Field Descriptions
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 5
Figure 14-9. SCI Status Register 1 (SCIS1)
RDRF
0
5
IDLE
Section 14.3.3.2, “Receiver Wakeup
Section 14.3.2.1, “Send Break and Queued
0
4
Description
Description
OR
3
0
NF
0
2
Operation,” for more details.
Freescale Semiconductor
FE
Idle,” for more details.
0
1
PF
0
0
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