tmpr4937 TOSHIBA Semiconductor CORPORATION, tmpr4937 Datasheet - Page 104
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tmpr4937
Manufacturer Part Number
tmpr4937
Description
64-bit Tx System Risc
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMPR4937.pdf
(552 pages)
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7.3.2
ADDR[14:13]
ADDR[8]
ADDR[7:6]
DATA[5]
DATA[4]
DATA[1:0]
Pin Name
⎯
⎯
Global/Boot-up Options
use global options that make settings common to all channels.
external pins (Boot pins) during reset.
“5.2.1 Chip Configuration Register” for more information.)
In addition to the settings made separately for each channel, the Channel Control Registers can also
External Bus Controller Channel 0 can be used as a Boot memory channel. Channel 0 is set by the
These settings are summarized below in Table 7.3.1. (Please refer to “3.3 Configuration signals” and
CCFG.ARMODE
CCFG.ACEHOLD
CCFG.SYSSP
EBCCR0.ME
EBCCR0.SP
EBCCR0.BC
EBCCR0.WT[0]
EBCCR0.BSZ
Set Register
Table 7.3.1 Global/Boot-up Options
Selects the operation mode of the ACK*/READY signal.
0 = ACK*/READY Dynamic mode (Default)
1 = ACK*/READY Static mode
Sets the address hold time relative to the ACE* signal.
0: Address changes simultaneous to deassertion of the ACE* signal.
1: Address changes 1 clock cycle after deassertion of the ACE* signal.
Specifies the division ratio of the SYSCLK output relative to the internal
bus clock (GBUSCLK).
00: 1/4 speed (1/4 the GBUSCLK frequency)
01: 1/3 speed (1/3 the GBUSCLK frequency)
10: 1/2 speed (1/2 the GBUSCLK frequency)
11: Full speed (same frequency as the GBUSCLK frequency)
Specifies whether to enable or disable Channel 0.
0: Disable this channel as a Boot channel.
1: Enable this channel as a Boot channel.
Specifies the operation speed of Channel 0.
00: 1/4 Speed mode
01: 1/3 Speed mode
10: 1/2 Speed mode
11: Full Speed mode
When accessing Channel 0, specifies whether to use the BWE[3:0] signal
as a Byte Enable signal (BE[3:0]) or to use it as a Byte Write Enable
signal (BWE[3:0]).
0: Byte Enable mode
1: Byte Write Enable mode
Specifies the Channel 0 access mode.
0: Normal mode (DATA[4] = H)
1: External ACK mode (DATA[4] = L)
Specifies the memory bus width of Channel 0.
00: Reserved
01: 32-bit width
10: 16-bit width
11: 8-bit width
(Default)
7-4
Chapter 7 External Bus Controller
Explanation
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