参数资料
型号: SPMC16V1CPU20
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 20.97 MHz, MICROCONTROLLER, PQFP100
封装: TQFP-100
文件页数: 5/128页
文件大小: 571K
代理商: SPMC16V1CPU20
MOTOROLA
MC68HC16V1
102
MC68HC16V1TS/D
SPCR0 contains parameters for configuring the QSPI before it is enabled. The CPU can read and write
this register. The QSM has read-only access.
MSTR — Master/Slave Mode Select
0 = QSPI is a slave device and only responds to externally generated serial data.
1 = QSPI is system master and can initiate transmission to external SPI devices.
MSTR configures the QSPI for either master or slave mode operation. This bit is cleared on reset and
may only be written by the CPU.
WOMQ — Wired-OR Mode for QSPI Pins
0 = Outputs have normal MOS drivers.
1 = Pins designated for output by DDRQS have open-drain drivers.
WOMQ allows the wired-OR function to be used on QSPI pins, regardless of whether they are used as
general-purpose outputs or as QSPI outputs. WOMQ affects the QSPI pins regardless of whether the
QSPI is enabled or disabled.
BITS[3:0] — Bits Per Transfer
In master mode, when BITSE in a command is set, the BITS[3:0] field determines the number of data
bits transferred. When BITSE is cleared, eight bits are transferred. Reserved values default to eight bits.
In slave mode, the command RAM is not used and the setting of BITSE has no effect on QSPI transfers.
Instead, the BITS[3:0] field determines the number of bits the QSPI will receive during each transfer be-
fore storing the received data.
Table 56 shows the number of bits per transfer.
SPCR0 — QSPI Control Register 0
$YFFC18
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MSTR
WOMQ
BITS[3:0]
CPOL
CPHA
SPBR[7:0]
RESET:
0
1
0
1
0
Table 56 Bits Per Transfer
BITS[3:0]
Bits per Transfer
0000
16
0001
Reserved
0010
Reserved
0011
Reserved
0100
Reserved
0101
Reserved
0110
Reserved
0111
Reserved
1000
8
1001
9
1010
10
1011
11
1100
12
1101
13
1110
14
1111
15
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