MC9S08AW32CFGE Freescale, MC9S08AW32CFGE Datasheet - Page 189
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MC9S08AW32CFGE
Manufacturer Part Number
MC9S08AW32CFGE
Description
Manufacturer
Freescale
Datasheet
1.MC9S08AW32CFGE.pdf
(324 pages)
Specifications of MC9S08AW32CFGE
Cpu Family
HCS08
Device Core Size
8b
Frequency (max)
40MHz
Interface Type
I2C/SCI/SPI
Total Internal Ram Size
2KB
# I/os (max)
34
Number Of Timers - General Purpose
8
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
44
Package Type
LQFP
Program Memory Type
Flash
Program Memory Size
32KB
Lead Free Status / RoHS Status
Compliant
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11.2.4
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.
Freescale Semiconductor
Reset
TDRE
Field
RWU
Field
SBK
TC
1
0
7
6
W
R
TDRE
SCI Status Register 1 (SCIxS1)
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
SCIxS1 with TDRE = 1 and then write to the SCI data register (SCIxD).
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 SCIxS1 with TC = 1 and then doing one of the following three things:
1
7
• Write to the SCI data register (SCIxD) to transmit new data
• Queue a preamble by changing TE from 0 to 1
• Queue a break character by writing 1 to SBK in SCIxC2
= Unimplemented or Reserved
Table 11-4. SCIxC2 Register Field Descriptions (continued)
TC
1
6
Table 11-5. SCIxS1 Register Field Descriptions
Figure 11-8. SCI Status Register 1 (SCIxS1)
RDRF
0
5
MC9S08AW60 Data Sheet, Rev 2
IDLE
Section 11.3.3.2, “Receiver Wakeup
Section 11.3.2.1, “Send Break and Queued
0
4
Description
Description
Chapter 11 Serial Communications Interface (S08SCIV2)
OR
3
0
NF
0
2
Operation” for more details.
FE
Idle” for more details.
0
1
PF
0
0
189
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