MC68HC908AB32 鈥� Rev. 1.1" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� MC68HC908AB32CFU
寤犲晢锛� Freescale Semiconductor
鏂囦欢闋佹暩(sh霉)锛� 233/392闋�
鏂囦欢澶у皬锛� 0K
鎻忚堪锛� IC MCU 8MHZ 32K FLASH 64-QFP
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 84
绯诲垪锛� HC08
鏍稿績铏曠悊鍣細 HC08
鑺珨灏哄锛� 8-浣�
閫熷害锛� 8MHz
閫i€氭€э細 SCI锛孲PI
澶栧湇瑷�(sh猫)鍌欙細 POR锛孭WM
杓稿叆/杓稿嚭鏁�(sh霉)锛� 51
绋嬪簭瀛樺劜鍣ㄥ閲忥細 32KB锛�32K x 8锛�
绋嬪簭瀛樺劜鍣ㄩ鍨嬶細 闁冨瓨
EEPROM 澶у皬锛� 512 x 8
RAM 瀹归噺锛� 1K x 8
闆诲 - 闆绘簮 (Vcc/Vdd)锛� 4.5 V ~ 5.5 V
鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒锛� A/D 8x8b
鎸暕鍣ㄥ瀷锛� 鍏�(n猫i)閮�
宸ヤ綔婧害锛� -40°C ~ 85°C
灏佽/澶栨锛� 64-QFP
鍖呰锛� 鎵樼洡
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Serial Peripheral Interface Module (SPI)
Technical Data
MC68HC908AB32 鈥� Rev. 1.1
308
Serial Peripheral Interface Module (SPI)
Freescale Semiconductor
MODFEN 鈥� Mode Fault Enable Bit
This read/write bit, when set to 1, allows the MODF flag to be set. If
the MODF flag is set, clearing the MODFEN does not clear the MODF
flag. If the SPI is enabled as a master and the MODFEN bit is low,
then the SS pin is available as a general-purpose I/O.
If the MODFEN bit is set, then this pin is not available as a general-
purpose I/O. When the SPI is enabled as a slave, the SS pin is not
available as a general-purpose I/O regardless of the value of
If the MODFEN bit is low, the level of the SS pin does not affect the
operation of an enabled SPI configured as a master. For an enabled
SPI configured as a slave, having MODFEN low only prevents the
MODF flag from being set. It does not affect any other part of SPI
SPR1 and SPR0 鈥� SPI Baud Rate Select Bits
In master mode, these read/write bits select one of four baud rates as
shown in Table 16-4. SPR1 and SPR0 have no effect in slave mode.
Reset clears SPR1 and SPR0.
Use this formula to calculate the SPI baud rate:
where:
CGMOUT = base clock output of the clock generator module (CGM)
BD = baud rate divisor
Table 16-4. SPI Master Baud Rate Selection
SPR1 and SPR0
Baud Rate Divisor (BD)
00
2
01
8
10
32
11
128
Baud rate
CGMOUT
2BD
--------------------------
=
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